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Combined Electrocardiography- and Respiratory-Triggered CT of the Lung to Reduce Respiratory Misregistration Artifacts between Imaging Slabs in Free-Breathing Children: Initial Experience

posted by Hyun Woo Goo, M.D. | Dec 7, 2017
Hyun Woo Goo, M.D.

Cardiac and respiratory motion artifacts degrade the image quality of lung CT in free-breathing children. The aim of this study was to evaluate the effect of combined electrocardiography (ECG) and respiratory triggering on respiratory misregistration artifacts on lung CT in free-breathing children. Read more

Evaluation of commissural malalignment of aortic-pulmonary sinus using cardiac CT for arterial switch operation: comparison with transthoracic echocardiography.

posted by Hyun Woo Goo, M.D. | Nov 30, 2017
Hyun Woo Goo, M.D.

There are limited data regarding the influence of commissural malalignment of the aortic-pulmonary sinus on the arterial switch operation. Read more

Patient Size-Specific Analysis of Dose Indexes From CT Lung Cancer Screening

posted by dsct.com | Nov 23, 2017
dsct.com

The U.S. Centers for Medicare & Medicaid Services (CMS) recently approved the use of low-dose CT for lung cancer screening and described volumetric CT dose index (CTDIvol) requirements. These were based on the National Lung Screening Trial, which used only fixed-tube-current techniques. The aim of this study was to evaluate … Read more

Intra-individual diagnostic image and organ-specific-radiation dose comparison between spiral cCT with iterative image reconstruction and z-axis automated tube current modulation and sequential cCT

posted by Thomas Henzler, MD | Nov 16, 2017
Thomas Henzler, MD

To prospectively evaluate image quality and organ-specific-radiation dose of spiral cranial CT (cCT) combined with automated tube current modulation (ATCM) and iterative image reconstruction (IR) in comparison to sequential tilted cCT reconstructed with filtered back projection (FBP) without ATCM. Read more

Detecting Intracranial Hemorrhage Using Automatic Tube Current Modulation With Advanced Modeled Iterative Reconstruction in Unenhanced Head Single- and Dual-Energy Dual-Source CT

posted by Julian L. Wichmann, M.D. | Nov 9, 2017
Julian L. Wichmann, M.D.

The purpose of our study was to determine diagnostic accuracy, image quality, and radiation dose of low-dose single- and dual-energy unenhanced third-generation dual-source head CT for detection of intracranial hemorrhage (ICH). Read more

A Novel Imaging Technique (X-Map) to Identify Acute Ischemic Lesions Using Noncontrast Dual-Energy CT

posted by dsct.com | Nov 2, 2017
dsct.com

We evaluated whether X-map, a novel imaging technique, can visualize ischemic lesions within 20 hours after the onset in patients with acute ischemic stroke, using noncontrast dual-energy CT (DECT). Read more

High-pitch spiral CT: effect on image quality and radiation dose in pediatric chest CT

posted by Michael M. Lell, M.D. | Oct 26, 2017
Michael M. Lell, M.D.

Computed tomography (CT) is considered the method of choice in thoracic imaging for a variety of indications. Sedation is usually necessary to enable CT and to avoid deterioration of image quality because of patient movement in small children. We evaluated a new, subsecond high-pitch scan mode (HPM), which obviates the … Read more

Quantitative Prediction of Stone Fragility From Routine Dual Energy CT: Ex vivo proof of Feasibility

posted by dsct.com | Oct 19, 2017
dsct.com

Previous studies have demonstrated a qualitative relationship between stone fragility and internal stone morphology. The goal of this study was to quantify morphologic features from dual-energy computed tomography (CT) images and assess their relationship to stone fragility. Read more

Dual-energy CT quantitative imaging: a comparison study between twin-beam and dual-source CT scanners

posted by dsct.com | Oct 12, 2017
dsct.com

To assess image quality and to quantify the accuracy of relative electron densities (ρe ) and effective atomic numbers (Zeff ) for three dual-energy computed tomography (DECT) scanners: a novel single-source split-filter (i.e., twin-beam) and two dual-source scanners. Read more

Tailored Duration of Contrast Material Injection in High-Pitch Computed Tomographic Aortography With a Double-Level Test Bolus Method

posted by dsct.com | Oct 5, 2017
dsct.com

To achieve the efficient usage of contrast material (CM) in high-pitch CT aortography, an appropriate duration of the CM injection is crucial. We used a modification of the double-level test bolus method for determination of proper injection duration with the aim of evaluating the image quality of tailored-duration CM injection … Read more

Sporadic insulinomas on volume perfusion CT: dynamic enhancement patterns and timing of optimal tumour-parenchyma contrast

posted by dsct.com | Sep 28, 2017
dsct.com

To assess enhancement patterns of sporadic insulinomas on volume perfusion CT (VPCT), and to identify timing of optimal tumour-parenchyma contrast. Read more

Spectral optimization of iodine-enhanced CT: Quantifying the effect of tube voltage on image quality and radiation exposure determined at an anthropomorphic phantom

posted by Thomas Henzler, MD | Sep 21, 2017
Thomas Henzler, MD

To provide an experimental basis for spectral optimization of iodine-enhanced CT by a quantitative analysis of image quality and radiation dose characteristics consistently measured for a large variety of scan settings at an anthropomorphic phantom. Read more

Efficacy of a dynamic collimator for overranging dose reduction in a second- and third-generation dualsource CT scanner

posted by Ronald Booij | Sep 14, 2017
Ronald Booij

The purpose of this study was to assess the efficacy of the renewed dynamic collimator in a third-generation dualsource CT (DSCT) scanner and to determine the improvements over the second-generation scanner. Read more

Vertebral Compression Fractures: Third-Generation Dual-Energy CT for Detection of Bone Marrow Edema at Visual and Quantitative Analyses

posted by dsct.com | Sep 7, 2017
dsct.com

To assess the diagnostic performance of a third-generation dual-energy computed tomographic (CT) virtual noncalcium (VNCa) technique for detection of traumatic bone marrow edema in patients with vertebral compression fractures. Read more

Reducing Iodine Contrast Volume in CT Angiography of the Abdominal Aorta Using Integrated Tube Potential Selection and Weight-Based Method Without Compromising Image Quality

posted by dsct.com | Aug 31, 2017
dsct.com

The purpose of this study is to determine whether image quality was maintained when a weight-based protocol incorporating tube potential selection was used to select lower iodine contrast volumes for aortic CT angiography (CTA). Read more

Low dose time-resolved CT-angiography in pediatric patients with venous malformations using 3rd generation dual-source CT: Initial experience

posted by Thomas Henzler, MD | Aug 24, 2017
Thomas Henzler, MD

To prospectively evaluate the diagnostic value and radiation dose of time-resolved CT-Angiography (4D-CTA) in pediatric patients with venous malformations using 3rd generation dual-source CT (DSCT) at 70 kVp tube voltage. Read more

Improved visual delineation of the intimal flap in Stanford type A and B dissections at 3rd generation dual-source high-pitch CT angiography

posted by Julian L. Wichmann, M.D. | Aug 17, 2017
Julian L. Wichmann, M.D.

Evaluation of the intimal flap visibility comparing 2nd and 3rd generation dual-source high-pitch CT. Read more

ECG-gated Versus Non-ECG-gated High-pitch Dual-source CT for Whole Body CT Angiography (CTA)

posted by Julian L. Wichmann, M.D. | Aug 10, 2017
Julian L. Wichmann, M.D.

To investigate motion artifacts, image quality, and practical differences in electrocardiographic (ECG)-gated versus non-ECGgated high-pitch dual-source computed tomography angiography (CTA) of the whole aorta. Read more

Diagnostic value of transmural perfusion ratio derived from dynamic CT-based myocardial perfusion imaging for the detection of haemodynamically relevant coronary artery stenosis

posted by dsct.com | Aug 3, 2017
dsct.com

To investigate the additional value of transmural perfusion ratio (TPR) in dynamic CT myocardial perfusion imaging for detection of haemodynamically significant coronary artery disease compared with fractional flow reserve (FFR). Read more

Low-dose abdominal CT for detection of urinary stone disease – Impact of additional spectral shaping of the X-ray beam on image quality and dose parameters

posted by dsct.com | Jul 27, 2017
dsct.com

To evaluate a novel tin filter-based abdominal CT protocol for urolithiasis in terms of image quality and CT dose parameters. Read more

Improved Delineation of Pulmonary Embolism and Venous Thrombosis Through Frequency Selective Nonlinear Blending in CT

posted by dsct.com | Jul 20, 2017
dsct.com

The aim of this study was to test the hypothesis that a novel frequency selective nonlinear blending (NLB) algorithm increases the delineation of pulmonary embolism and venous thrombosis in portal-venous phase whole-body staging computed tomography (CT). Read more

Imaging the Parasinus Region with a Third-Generation Dual Source CT and the Effect of Tin Filtration on Image Quality and Dose.

posted by Michael M. Lell, M.D. | Jul 13, 2017
Michael M. Lell, M.D.

CT is the imaging technique of choice in the evaluation of midface trauma or inflammatory disease. We performed a systematic evaluation of scan protocols to optimize image quality and radiation exposure on third-generation dual-source CT. Read more

Spinal dual-energy computed tomography: improved visualisation of spinal tumorous growth with a noise-optimised advanced monoenergetic post-processing algorithm.

posted by dsct.com | Jul 6, 2017
dsct.com

The aim of this study was to evaluate the effect of advanced monoenergetic post-processing (MEI+) on the visualisation of spinal growth in contrast-enhanced dual-energy CT (DE-CT). Read more

Detection of single-phase CTA occult vessel occlusions in acute ischemic stroke using CT perfusion-basedwavelet-transformed angiography

posted by dsct.com | Jun 29, 2017
dsct.com

To determine the detection rate of intracranial vessel occlusions using CT perfusion-based wavelet-transformed angiography (waveletCTA) in acute ischemic stroke patients, in whom single-phase CTA (spCTA) failed to detect an occlusion. Read more

Wavelet-Based Angiographic Reconstruction of CT Perfusion Data: Diagnostic

posted by dsct.com | Jun 22, 2017
dsct.com

The aim of this study was to test the diagnostic value of wavelet-based angiographic reconstruction of CT perfusion data (waveletCTA) to detect cerebral venous sinus thrombosis (CVST) in patients who underwent whole-brain CT perfusion imaging (WB-CTP). Read more

Feasibility of spectral shaping for detection and quantification of coronary calcifications in ultra-low dose CT.

posted by Rozemarijn Vliegenthart, M.D., PhD | Jun 15, 2017
Rozemarijn Vliegenthart, M.D., PhD

Objectives: To evaluate detectability and quantification of coronary calcifications for CT with a tin filter for spectral shaping. Read more

Optimal timing of image acquisition for arterial first pass CT myocardial perfusion imaging.

posted by Rozemarijn Vliegenthart, M.D., PhD | Jun 7, 2017
Rozemarijn Vliegenthart, M.D., PhD

Purpose: To determine the optimal timing of arterial first pass computed tomography (CT) myocardial perfusion imaging (CTMPI) based on dynamic CTMPI acquisitions. Read more

Efficacy of a dynamic collimator for overranging dose reduction in a second- and third-generation dual source CT scanner

posted by Ronald Booij | May 31, 2017
Ronald Booij

The purpose of this study was to assess the efficacy of the renewed dynamic collimator in a third-generation dual source CT (DSCT) scanner and to determine the improvements over the second-generation scanner. Read more

CT angiography for planning transcatheter aortic valve replacement using automated tube voltage selection: Image quality and radiation exposure.

posted by Carlo Nicola De Cecco, M.D., PhD | May 11, 2017
Carlo Nicola De Cecco, M.D., PhD

Purpose: To assess image quality and accuracy of CT angiography (CTA) for transcatheter aortic valve replacement (TAVR) planning performed with 3rd generation dual-source CT (DSCT). Read more

Gouty arthritis: the diagnostic and therapeutic impact of dual-energy CT

posted by Hatem Alkadhi, M.D., M.P.H., E.B.C.R. | Apr 25, 2017
Hatem Alkadhi, M.D., M.P.H., E.B.C.R.

Objectives: To determine the diagnostic and therapeutic impact of dual-energy computed tomography (DECT) in gout. Read more

Myocardial perfusion imaging with dual energy CT.

posted by Carlo Nicola De Cecco, M.D., PhD | Apr 18, 2017
Carlo Nicola De Cecco, M.D., PhD

The aim of this review is to present currently available DECT techniques for static myocardial perfusion imaging and recent clinical applications and ongoing investigations. Read more

Computer-aided detection (CAD) of solid pulmonary nodules in chest x-ray equivalent ultralow dose chest CT – first in-vivo results at doselevels of 0.13 mSv

posted by Hatem Alkadhi, M.D., M.P.H., E.B.C.R. | Apr 10, 2017
Hatem Alkadhi, M.D., M.P.H., E.B.C.R.

Objectives: To determine the value of computer-aided detection (CAD) for solid pulmonary nodules in ultralow radiation dose single-energy computed tomography (CT) of the chest using third-generation dual-source CT at 100kV and fixed tube current at 70 mAs with tin filtration. Read more

Coronary CT angiography-derived quantitative markers for predicting in-stent restenosis.

posted by Carlo Nicola De Cecco, M.D., PhD | Apr 1, 2017
Carlo Nicola De Cecco, M.D., PhD

Objective: To evaluate quantitative markers derived from coronary CT angiography (coronary CTA) performed prior to percutaneous coronary intervention (PCI) with stent placement for predicting in-stent restenosis (ISR) as defined by quantitative coronary angiography (QCA). Read more

Dynamic CT myocardial perfusion imaging.

posted by Carlo Nicola De Cecco, M.D., PhD | Mar 27, 2017
Carlo Nicola De Cecco, M.D., PhD

This review aims to discuss dynamic CT myocardial perfusion as a new technique in the assessment of CAD. Read more

Organ Dose and Attributable Cancer Risk in Lung Cancer Screening with Low-Dose CT.

posted by Hatem Alkadhi, M.D., M.P.H., E.B.C.R. | Mar 22, 2017
Hatem Alkadhi, M.D., M.P.H., E.B.C.R.

Purpose: Lung cancer screening with CT has been recently recommended for decreasing lung cancer mortality. The radiation dose of CT, however, must be kept as low as reasonably achievable for reducing potential stochastic risks from ionizing radiation. The purpose of this study was to calculate individual patients’ lung doses and … Read more

Prognostic implications of coronary CT angiography-derived quantitative markers for the prediction of major adverse cardiac events.

posted by Carlo Nicola De Cecco, M.D., PhD | Mar 17, 2017
Carlo Nicola De Cecco, M.D., PhD

Objective: To evaluate quantitative markers derived from coronary CT angiography (coronary CTA) for the prediction of major adverse cardiac events (MACE). Read more

Low contrast medium-volume third-generation dual-source CT angiography for transcatheter aortic valve replacement planning.

posted by Carlo Nicola De Cecco, M.D., PhD | Mar 12, 2017
Carlo Nicola De Cecco, M.D., PhD

Purpose: To investigate feasibility, image quality and safety of low-tube-voltage, low-contrast-volume comprehensive cardiac and aortoiliac CT angiography (CTA) for planning transcatheter aortic valve replacement (TAVR). Read more

Prospective Randomized Comparison of High-pitch CT at 80 kVp Under Free Breathing with Standard-pitch CT at 100 kVp Under Breath-Hold for Detection of Pulmonary Embolism.

posted by Hatem Alkadhi, M.D., M.P.H., E.B.C.R. | Mar 7, 2017
Hatem Alkadhi, M.D., M.P.H., E.B.C.R.

Rationale and Objectives: To prospectively compare high-pitch computed tomography (HPCT) under free breathing (FB) with standard-pitch CT (SPCT) under breath-hold (BH) for detection of pulmonary embolism (PE). Read more

Correction Factors for CT Coronary Artery Calcium Scoring Using Advanced Modeled Iterative Reconstruction Instead of Filtered Back Projection.

posted by Carlo Nicola De Cecco, M.D., PhD | Mar 2, 2017
Carlo Nicola De Cecco, M.D., PhD

Rationale and Objectives: Iterative reconstruction (IR) computed tomography (CT) techniques allow for radiation dose reduction while maintaining image quality. However, CT coronary artery calcium (CAC) scores may be influenced by certain IR algorithms. The aim of our study is to identify suitable correction factors to ensure consistency between IR and … Read more

Patient Comfort During Contrast Media Injection in Coronary CT Angiography Using Varying Contrast Media Concentrations and Flow Rates: Results From the EICAR Trial.

posted by Marco Das, M.D. | Feb 26, 2017
Marco Das, M.D.

Purpose: Pain sensation and extravasation are potential drawbacks of contrast media (CM) injection during computed tomographic angiography. The purpose was to evaluate safety and patient comfort of higher flow rates in different CM protocols during coronary computed tomographic angiography. Read more

Diagnostic accuracy of coronary CT angiography using 3rd-generation dual-source CT and automated tube voltage selection: Clinical application in a non-obese and obese patient population.

posted by Carlo Nicola De Cecco, M.D., PhD | Feb 21, 2017
Carlo Nicola De Cecco, M.D., PhD

Purpose: To investigate diagnostic accuracy of 3rd-generation dual-source CT (DSCT) coronary angiography in obese and non-obese patients. Read more

Optimization of window settings for standard and advanced virtual monoenergetic imaging in abdominal dual-energy CT angiography.

posted by Carlo Nicola De Cecco, M.D., PhD | Feb 16, 2017
Carlo Nicola De Cecco, M.D., PhD

Objectives: To determine the optimal window setting for displaying virtual monoenergetic reconstructions of third generation dual-source, dual-energy CT (DECT) angiography of the abdomen. Read more

T(Rho) and magnetization transfer and INvErsion recovery (TRAMINER)-prepared imaging A novel contrast-enhanced flow-independent dark-blood technique for the evaluation of myocardial late gadolinium enhancement in patients with myocardial infarction.

posted by Carlo Nicola De Cecco, M.D., PhD | Feb 11, 2017
Carlo Nicola De Cecco, M.D., PhD

Purpose: To evaluate a new dark-blood late gadolinium enhancement (LGE) technique called “T(Rho) And Magnetization transfer and INvErsion Recovery” (TRAMINER) for the ability to detect myocardial LGE versus standard “bright-blood” inversion recovery (SIR) imaging. Read more

Correlation between Dual-Energy and Perfusion CT in Patients with Hepatocellular Carcinoma.

posted by Hatem Alkadhi, M.D., M.P.H., E.B.C.R. | Feb 6, 2017
Hatem Alkadhi, M.D., M.P.H., E.B.C.R.

Purpose: To develop a dual-energy contrast media-enhanced computed tomographic (CT) protocol by using time-attenuation curves from previously acquired perfusion CT data and to evaluate prospectively the relationship between iodine enhancement metrics at dual-energy CT and perfusion CT parameters in patients with hepatocellular carcinoma (HCC). Read more

White Paper of the Society of Computed Body Tomography and Magnetic Resonance on Dual-Energy CT, Part 4: Abdominal and Pelvic Applications.

posted by Carlo Nicola De Cecco, M.D., PhD | Feb 1, 2017
Carlo Nicola De Cecco, M.D., PhD

This article, part 4, discusses DECT for abdominal and pelvic applications and, at the end of each, will offer our consensus opinions on the current clinical utility of the application and opportunities for further research. Read more

White Paper of the Society of Computed Body Tomography and Magnetic Resonance on Dual-Energy CT, Part 3: Vascular, Cardiac, Pulmonary, and Musculoskeletal Applications.

posted by Carlo Nicola De Cecco, M.D., PhD | Jan 29, 2017
Carlo Nicola De Cecco, M.D., PhD

This paper describes computed tomography angiography and thoracic, cardiac, vascular, and musculoskeletal clinical applications. Read more

White Paper of the Society of Computed Body Tomography and Magnetic Resonance on Dual-Energy CT, Part 2: Radiation Dose and Iodine Sensitivity.

posted by Carlo Nicola De Cecco, M.D., PhD | Jan 27, 2017
Carlo Nicola De Cecco, M.D., PhD

This paper, part 2, addresses radiation dose and iodine sensitivity in dual-energy computed tomography. Read more

Computer-aided evaluation of low-dose and low-contrast agent third-generation dualsource CT angiography prior to transcatheter aortic valve implantation (TAVI)

posted by dsct.com | Jan 23, 2017
dsct.com

To evaluate the performance of computer-aided evaluation software for a comprehensive workup of patients prior to transcatheter aortic valve implantation (TAVI) using low-contrast agent and low radiation dose third-generation dualsource CT angiography. Read more

Noise Texture Deviation: A Measure for Quantifying Artifacts in CT Images With Iterative Reconstructions.

posted by Hatem Alkadhi, M.D., M.P.H., E.B.C.R. | Jan 22, 2017
Hatem Alkadhi, M.D., M.P.H., E.B.C.R.

Objectives: The aims of this study were to introduce the measure noise texture deviation as quantitative parameter for evaluating iterative reconstruction (IR)-specific artifacts in computed tomography (CT) images and to test whether IR-specific artifacts, quantified through this measure, are reduced in advanced modeled IR (ADMIRE) as compared with sinogram-affirmed IR … Read more

Can dual-energy computed tomography improve visualization of hypoenhancing liver lesions in portal venous phase? Assessment of advanced image-based virtual monoenergetic images.

posted by Carlo Nicola De Cecco, M.D., PhD | Jan 17, 2017
Carlo Nicola De Cecco, M.D., PhD

Purpose: The purpose was to assess image quality of portal-venous phase dual-energy computed tomography (DECT) for liver lesions. Read more

Effect of Localizer Radiography Projection on Organ Dose at Chest CT with Automatic Tube Current Modulation.

posted by Hatem Alkadhi, M.D., M.P.H., E.B.C.R. | Jan 12, 2017
Hatem Alkadhi, M.D., M.P.H., E.B.C.R.

Purpose: To calculate the effect of localizer radiography projections to the total radiation dose, including both the dose from localizer radiography and that from subsequent chest computed tomography (CT) with tube current modulation (TCM). Read more

White Paper of the Society of Computed Body Tomography and Magnetic Resonance on Dual-Energy CT, Part 1 Technology and Terminology.

posted by Carlo Nicola De Cecco, M.D., PhD | Jan 7, 2017
Carlo Nicola De Cecco, M.D., PhD

This article, part 1, describes the fundamentals of the physical basis for DECT and the technology of DECT and proposes uniform nomenclature to account for differences in proprietary terms among manufacturers. Read more

Correlation and predictive value of aortic root calcification markers with coronary artery calcification and obstructive coronary artery disease.

posted by Carlo Nicola De Cecco, M.D., PhD | Jan 2, 2017
Carlo Nicola De Cecco, M.D., PhD

Objective: To evaluate the correlation between aortic root calcification (ARC) markers and coronary artery calcification (CAC) derived from coronary artery calcium scoring (CACS) and their ability to predict obstructive coronary artery disease (CAD). Read more

Cinematic rendering – an alternative to volume rendering for 3D CT imaging

posted by Hatem Alkadhi, M.D., M.P.H., E.B.C.R. | Dec 27, 2016
Hatem Alkadhi, M.D., M.P.H., E.B.C.R.

The objective of this review is to illustrate the image appearance and potential value of CR in comparison with conventional VR in a number of various applications and different anatomical regions. Read more

Virtual non-contrast in second-generation, dual-energy computed tomography: reliability of attenuation values.

posted by dsct.com | Dec 22, 2016
dsct.com

Purpose: To evaluate the reliability of attenuation values in virtual non-contrast images (VNC) reconstructed from contrast-enhanced, dual-energy scans performed on a second-generation dual-energy CT scanner, compared to single-energy, non-contrast images (TNC). Read more

Estimation and comparison of effective dose (E) in standard chest CT by organ dose measurements and dose-length-product methods and assessment of the influence of CT tube potential (energy dependency) on effective dose in a dual-source CT.

posted by Ralf Bauer, M.D. | Dec 13, 2016
Ralf Bauer, M.D.

Purpose: To determine effective dose (E) during standard chest CT using an organ dose-based and a dose-length-product-based (DLP) approach for four different scan protocols including high-pitch and dual-energy in a dual-source CT scanner of the second generation. Read more

Utility of Low-dose High-pitch Scanning for Pediatric Cardiac CT Imaging

posted by dsct.com | Dec 4, 2016
dsct.com

In this article, we review the unique advantages of dual-source cardiac CT relative to other imaging modalities and illustrate its utility for patient management with multiple case examples. Read more

Non-sedated, free breathing cardiac CT for evaluation of complex congenital heart disease in neonates.

posted by dsct.com | Nov 30, 2016
dsct.com

Objectives: To evaluate the image quality and risk of free breathing, non-sedated cardiac CTA for definition of CHD in the neonatal period and to determine accuracy compared with interventional findings. Read more

Virtual unenhanced second generation dual-source CT of the liver: is it time to discard the conventional unenhanced phase?

posted by dsct.com | Nov 25, 2016
dsct.com

Introduction: Dual-energy dual source CT can almost simultaneously image patients using two different tube potentials, allowing material decomposition and creation of ‘virtual unenhanced’ (VU) images from post-contrast series. Read more

Is ECG Triggering for Motion Artifact Reduction in Dual-Source CT Angiographies of the Ascending Aorta still required in times of High-Pitch scanning?

posted by dsct.com | Nov 22, 2016
dsct.com

Objectives: To compare electrocardiographic (ECG)-triggered high-pitch (HP) dual-source computed tomography angiography (CTA) with non- ECG-triggered HP CTA of the aorta, particularly the ascending aorta, with regard to image quality, motion artifacts, contrast-to-noise-ratio (CNR), signal-to-noise-ratio (SNR), and radiation dose. Read more

Technical Note: Improved CT number stability across patient size using dual-energy CT virtual monoenergetic imaging

posted by dsct.com | Nov 18, 2016
dsct.com

Purpose: To evaluate, over a wide range of phantom sizes, CT number stability achieved using two techniques for generating dual-energy computed tomography (DECT) virtual monoenergetic images. Read more

Image Quality of a Novel Frequency Selective Nonlinear Blending Algorithm: An Ex Vivo Phantom Study in Comparison to Single-Energy Acquisitions and Dual-Energy Acquisitions With Monoenergetic Reconstructions

posted by dsct.com | Nov 15, 2016
dsct.com

Objective: To evaluate the contrast enhancement applying a new frequency split nonlinear blending algorithm (best contrast [BC]) and to compare it with standard 120-kV single-energy computed tomography (SECT) images, as well as with low-kiloelectron volt monoenergetic extrapolations (Mono+40-100keV) from dual-energy CT (DECT) and with lowkilovolt (70-100 kV) SECT acquisitions. Read more

Dual-Energy CT-based Display of Bone Marrow Edema in Osteoporotic Vertebral Compression Fractures: Impact on Diagnostic Accuracy of Radiologists with Varying Levels of Experience in Correlation to MR Imaging.

posted by Ralf Bauer, M.D. | Nov 11, 2016
Ralf Bauer, M.D.

Purpose: To evaluate whether a dual-energy (DE) computed tomographic (CT) virtual noncalcium technique can improve the detection rate of acute thoracolumbar vertebral compression fractures in patients with osteoporosis compared with that at magnetic resonance (MR) imaging depending on the level of experience of the reading radiologist. Read more

Ultra-high pitch chest computed tomography at 70 kVp tube voltage in an anthropomorphic pediatric phantom and non-sedated pediatric patients: Initial experience with 3rd generation dual-source CT

posted by Thomas Henzler, MD | Nov 8, 2016
Thomas Henzler, MD

Purpose: To investigate radiation dose and image quality of pediatric chest CT performed at 70 kVp in an anthropomorphic pediatric phantom as well as in clinical patients. Read more

High pitch third generation dual-source CT: Coronary and cardiac visualization on routine chest CT

posted by dsct.com | Nov 1, 2016
dsct.com

Objectives: To evaluate myocardial and coronary visualization on high-pitch non-gated CT of the chest using 3rd generation dual-source computed tomography (CT). Read more

High-Pitch CT Pulmonary Angiography in Third Generation Dual-Source CT: Image Quality in an Unselected Patient Population

posted by dsct.com | Oct 28, 2016
dsct.com

Objectives: To investigate the feasibility of high-pitch CT pulmonary angiography (CTPA) in 3rd generation dual-source CT (DSCT) in unselected patients. Read more

Third-generation dual-source 70-kVp chest CT angiography with advanced iterative reconstruction in young children: image quality and radiation dose reduction platform.

posted by Michael M. Lell, M.D. | Oct 25, 2016
Michael M. Lell, M.D.

Objective: To evaluate image quality and radiation dose of high-pitch second- and third-generation dual-source chest CT angiography and to assess the effects of different levels of advanced modeled iterative reconstruction (ADMIRE) in newborns and children. Read more

Value of a noise-optimized virtual monoenergetic reconstruction technique in dual-energy CT for planning of transcatheter aortic valve replacement

posted by Ralf Bauer, M.D. | Oct 21, 2016
Ralf Bauer, M.D.

Objectives: To evaluate objective and subjective image quality of a noise-optimized virtual monoenergetic imaging (VMI+) reconstruction technique in dual-energy computed tomography (DECT) angiography prior to transcatheter aortic valve replacement (TAVR). Read more

CT Angiography of the Aorta: Prospective Evaluation of Individualized Low-Volume Contrast Media Protocols.

posted by Hatem Alkadhi, M.D., M.P.H., E.B.C.R. | Oct 18, 2016
Hatem Alkadhi, M.D., M.P.H., E.B.C.R.

Purpose: To prospectively develop individualized low-volume contrast media (CM) protocols adapted to tube voltage in patients undergoing computed tomographic (CT) angiography of the aorta. Read more

In Vitro Comparison of Second- and Third-generation Dual-source CT for Coronary Stent Visualization at Different Tube Potentials

posted by dsct.com | Oct 14, 2016
dsct.com

Rationale and Objectives: The study aimed to evaluate in vitro stent lumen visibility of coronary stents in a second- and third-generation dual-source computed tomography (CT) system at 100 and 120 kVp tube potential. Read more

Contrast volume reduction using third generation dual source CT for the evaluation of patients prior to transcatheter aortic valve implantation platform.

posted by Michael M. Lell, M.D. | Oct 10, 2016
Michael M. Lell, M.D.

Objective: Chronic renal failure is common in patients referred for transcatheter aortic valve implantation (TAVI). CT angiography is recommended and provides crucial information prior to TAVI. We evaluated the feasibility of a reduced contrast volume protocol for pre-procedural CTimaging. Read more

Improved visual delineation of the intimal flap in Standford type A and B dissections at 3rd generation dual-source high-pitch CT angiography

posted by Julian L. Wichmann, M.D. | Oct 4, 2016
Julian L. Wichmann, M.D.

Objective: Evaluation of the intimal flap visibility comparing 2nd and 3rd generation dual-source high-pitch CT. Read more

Imaging the renal lesion with dual-energy multidetector CT and multi-energy applications in clinical practice: what can it truly do for you?

posted by dsct.com | Sep 30, 2016
dsct.com

Objective: This special report gives a vendor-neutral outlook on technical essentials, recommended protocols, high-yield clinical opportunities and reviews radiation dose aspects of dual-energy MDCT imaging and multi-energy applications in renal lesions. In addition to a guide on interpretative traps and emerging problems, we provide an update on new, potential imaging … Read more

Evaluation of pulmonary nodules and infection on chest CT with radiation dose equivalent to chest radiography: Prospective intra-individual comparison study to standard dose CT

posted by Hatem Alkadhi, M.D., M.P.H., E.B.C.R. | Sep 27, 2016
Hatem Alkadhi, M.D., M.P.H., E.B.C.R.

Purpose: To compare prospectively, in patients undergoing chest computed tomography (CT) for pulmonary-nodules or infection, imagequality and accuracy of standard dose (SD) and reduced dose (RD) CT with tin-filtration. Read more

Dual-Energy CT for Quantification of Urinary Stone Composition in Mixed Stones: A Phantom Study.

posted by dsct.com | Sep 23, 2016
dsct.com

Objectives: The purpose of this study was to assess the feasibility of using dual-energy CT to accurately quantify uric acid and non-uric acid components in urinary stones of mixed composition. Read more

Case: D-Transposition of the Great Arteries – CT Evaluation of a Newborn

posted by dsct.com | Sep 20, 2016
dsct.com
  • http://health.siemens.com/ct_applications/somatomsessions/index
  • 2016-07-26_tabelle2

A 13-day-old female newborn suffering from desaturation was scheduled for a surgical operation on an arterial switch. A cardiac CT scan was ordered to evaluate the anatomy of the heart, the great vessels and the coronary arteries prior to the operation. Read more

Case: Sudden Cardiac Arrest after Knee Surgery – Painting the Whole Picture

posted by dsct.com | Sep 16, 2016
dsct.com
  • http://health.siemens.com/ct_applications/somatomsessions/index
  • 2016-07-26_tabelle1

A 33-year-old female patient (BMI 31 kg/m²), who had been discharged home from a peripheral hospital two days earlier (after knee surgery), called Emergency Medical Services (EMS) complaining of a sudden-onset dyspnea at rest. Ten minutes later, EMS personnel found her unconscious and pulseless upon arrival at her apartment. Cardiopulmonary … Read more

Comparison of organ-specific-radiation dose levels between 70 kVP perfusion and standard triphasic liver CT in patients with hepatocellular carcinoma using a Monte-Carlo-Simulation-based analysis platform.

posted by Thomas Henzler, MD | Sep 13, 2016
Thomas Henzler, MD

Purpose: The aim of this study was to systematically compare organ-specific-radiation dose levels between a radiation dose optimized perfusion CT (dVPCT) protocol of the liver and a tri-phasic standard CT protocol of the liver using a Monte-Carlo-Simulation-based analysis platform. Read more

Low-dose abdominal CT for detection of urinary stone disease – Impact of additional spectral shaping of the X-ray beam on image quality and dose

posted by Ralf Bauer, M.D. | Sep 9, 2016
Ralf Bauer, M.D.

Objective: To evaluate a novel tin filter-based abdominal CT protocol for urolithiasis in terms of image quality and CT dose parameters. Read more

Virtual unenhanced imaging of the liver with third-generation dual-source dual-energy CT and advanced modeled iterative reconstruction

posted by Carlo Nicola De Cecco, M.D., PhD | Sep 6, 2016
Carlo Nicola De Cecco, M.D., PhD

Objectives: To compare image quality and diagnostic accuracy for the detection of liver lesions of virtual unenhanced (VU) images based on third-generation dual-source dual- energy computed tomography (DECT) compared to conventional unenhanced (CU) images. Read more

Low-Dose CT of Paranasal Sinuses: Minimizing X-Ray Exposure with Spectral Shaping.

posted by Michael M. Lell, M.D. | Sep 2, 2016
Michael M. Lell, M.D.

Objective: This study’s aim was to investigate dose and image quality of tin filtration at 100 kV for pre-operative planning in low-dose paranasal CT imaging in a large patient cohort. Read more

Case: Diabetic Foot Syndrome Complicated by an Arteriovenous Fistula

posted by dsct.com | Aug 30, 2016
dsct.com
  • http://health.siemens.com/ct_applications/somatomsessions/index
  • 2016-07-26_tabelle4

A 64-year-old male patient with a known history of diabetes mellitus (DM) was feeling systemically unwell and noted problems with his left foot. He was presented for a CT angiography (CTA) evaluation. Read more

Development of an Ex Vivo, Beating Heart Model for CT Myocardial Perfusion.

posted by Rozemarijn Vliegenthart, M.D., PhD | Aug 26, 2016
Rozemarijn Vliegenthart, M.D., PhD

Objective: To test the feasibility of a CT-compatible, ex vivo, perfused porcine heart model for myocardial perfusion CT imaging. Read more

Case: Dual Energy Perfusion Maps Reveal the Extent of Perfusion Deficits from Multiple Peripheral Pulmonary Emboli

posted by Ralf Bauer, M.D. | Aug 23, 2016
Ralf Bauer, M.D.
  • http://health.siemens.com/ct_applications/somatomsessions/index
  • 2016-07-26_tabele3

A 58-year-old female patient presented to the emergency department complaining of shortness of breath and acute chest pain. History revealed an extended immobility due to long distance travel and further risk factors such as smoking and female gender. Risk of pulmonary embolism according to the Wells’ score was elevated, as … Read more

European course in pediatric radiology (ECPR 2016)

posted by dsct.com | Aug 22, 2016

Oct 12, 2016 to Oct 14, 2016. The European society of pediatric radiology (ESPR) organizes a series of annual courses covering different topics in pediatric radiology- European courses in pediatric radiology (ECPR). This year the topic is Pediatric Abdominal Imaging. The course will be held in the Scandic Edderkoppen Hotel in Oslo, Norway. Read more

29th International Congress Of Radiology 2016 (ICR 2016)

posted by dsct.com | Aug 22, 2016

Sep 21, 2016 to Sep 24, 2016. The 29th International Congress Of Radiology will be held in Buenos Aires, Argentina. Read more

CTA Academy: The Full Spectrum

posted by dsct.com | Aug 22, 2016

Sep 10, 2016; This two-day training course with expert faculty provides a unique opportunity to improve cardiovascular CT reading skills through personal hands-on training on workstations with immediate feedback by invasive coronary angiography for all 50 cases. Read more

Computed Tomography-Derived Parameters of Myocardial Morphology and Function in Black and White Patients With Acute Chest Pain.

posted by Rozemarijn Vliegenthart, M.D., PhD | Aug 19, 2016
Rozemarijn Vliegenthart, M.D., PhD

Our aim was to compare computed tomography (CT)–derived cardiac measurements between black patients with acute chest pain and age- and gender-matched white patients. Read more

Dynamic CT myocardial perfusion imaging identifies early perfusion abnormalities in diabetes and hypertension: insights from a multicenter registry.

posted by Rozemarijn Vliegenthart, M.D., PhD | Aug 16, 2016
Rozemarijn Vliegenthart, M.D., PhD

Objective: To analyze perfusion parameters derived from dynamic computed tomography perfusion imaging (CTPI) in patients with suspected coronary artery disease (CAD), and relationship with risk factors. Read more

Effect of automated tube voltage selection, integrated circuit detector and advanced iterative reconstruction on radiation dose and image quality of 3rd generation dual-source aortic CT angiography: An intra-individual comparison.

posted by Carlo Nicola De Cecco, M.D., PhD | Aug 12, 2016
Carlo Nicola De Cecco, M.D., PhD

Purpose: To compare, on an intra-individual basis, the effect of automated tube voltage selection (ATVS), integrated circuit detector and advanced iterative reconstruction on radiation dose and image quality of aortic CTA studies using 2nd and 3rd generation dual-source CT (DSCT). Read more

70-kVp High-pitch Computed Tomography Pulmonary Angiography with 40 mL Contrast Agent: Initial Experience.

posted by U. Joseph Schoepf, M.D. | Aug 5, 2016
U. Joseph Schoepf, M.D.

Rationale and Objectives: To assess image quality, radiation dose, and diagnostic accuracy of 70-kVp high-pitch computed tomography pulmonary angiography (CTPA) using 40 mL contrast agent and sinogram affirmed iterative reconstruction (SAFIRE) compared to 100-kVp CTPA using 60 mL contrast agent and filtered back projection. Read more

Cerebral CTA with Low Tube Voltage and Low Contrast Material Volume for Detection of Intracranial Aneurysms.

posted by Carlo Nicola De Cecco, M.D., PhD | Aug 2, 2016
Carlo Nicola De Cecco, M.D., PhD

Background and Purpose: Multidetector row CTA has become the primary imaging technique for detecting intracranial aneurysms. Technical progress enables the use of cerebral CTA with lower radiation doses and contrast media. We evaluated the diagnostic accuracy of 80-kV(peak) cerebral CTA with 30 mL of contrast agent for detecting intracranial aneurysms. Read more

Non-Electrocardiogram-Triggered 70-kVp High-Pitch Computed Tomography Angiography of the Whole Aorta With Iterative Reconstruction: Initial Results.

posted by U. Joseph Schoepf, M.D. | Jul 26, 2016
U. Joseph Schoepf, M.D.

Objectives: To evaluate the feasibility of non-electrocardiogram (ECG)-triggered 70-kVp high-pitch aortic computed tomography angiography (CTA) with iterative reconstruction (IR) and reduced contrast agent using second-generation dual-source CT (DSCT). Read more

Dual-Energy Computed Tomography Angiography of the Lower Extremity Runoff: Impact of Noise-Optimized Virtual Monochromatic Imaging on Image Quality and Diagnostic Accuracy.

posted by Julian L. Wichmann, M.D. | Jul 19, 2016
Julian L. Wichmann, M.D.

Objective: The aim of this study was to evaluate the impact of a noise-optimized virtual monochromatic imaging algorithm (VMI+) on image quality and diagnostic accuracy at dual-energy computed tomography angiography (CTA) of the lower extremity runoff. Read more

Quantitative evaluation of beam-hardening artefact correction in dual-energy CT myocardial perfusion imaging.

posted by Julian L. Wichmann, M.D. | Jul 15, 2016
Julian L. Wichmann, M.D.

Objectives: To assess quantitatively the impact of a novel reconstruction algorithm (“kernel”) with beam-hardening correction (BHC) on beam-hardening artefacts of the myocardium at dual-energy CT myocardial perfusion imaging (DE-CTMPI). Read more

Contrast-induced nephropathy in CT: incidence, risk factors and strategies for prevention.

posted by U. Joseph Schoepf, M.D. | Jul 12, 2016
U. Joseph Schoepf, M.D.

This review article addresses the controversies of incidence, causation, and prevention in an attempt to help the practicing radiologist adopt methods for their own department. Read more

Case: Ultra-low Dose and Ultra-fast Scan in a Patient with Dyspnea

posted by dsct.com | Jul 8, 2016
dsct.com

In this case, the patient suffered from dyspnea and could not hold his breath during the scan. A scan in Turbo Flash mode was performed in free breathing and completed in a total scan time of 0.42 s. Read more

Coronary CT angiography in obese patients using 3rd generation dual-source CT: effect of body mass index on image quality.

posted by U. Joseph Schoepf, M.D. | Jul 5, 2016
U. Joseph Schoepf, M.D.

Objectives: To evaluate the image quality of coronary CT angiography (CCTA) in obese patients using a 3rd generation, dual-source CT scanner. Read more

Case: Aortic Aneurysm with Complex Endovascular Repair

posted by Carlo Nicola De Cecco, M.D., PhD | Jul 1, 2016
Carlo Nicola De Cecco, M.D., PhD

In this case, 70 kV was applied which resulted in an excellent intravascular contrast enhancement with only 50 mL contrast medium and a significant effective dose reduction to 3.9 mSv. To further reduce the increased image noise, associated with the lower tube voltage setting, images were reconstructed using ADMIRE … Read more

Single- and dual-energy CT of the abdomen: comparison of radiation dose and image quality of 2nd and 3rd generation dual-source CT.

posted by Carlo Nicola De Cecco, M.D., PhD | Jun 28, 2016
Carlo Nicola De Cecco, M.D., PhD

Objectives: To compare single-energy (SECT) and dual-energy (DECT) abdominal CT examinations in matched patient cohorts regarding differences in radiation dose and image quality performed with second- and third-generation dual-source CT (DSCT). Read more

Individualized CT Angiography Protocols for the Evaluation of the Aorta: A Feasibility Study

posted by Marco Das, M.D. | Jun 24, 2016
Marco Das, M.D.

Purpose: Ionizing radiation and iodinated contrast media are potential drawbacks to repetitive follow-up CT angiography in current practice. The aim of the present study was to optimize radiation dose and contrast agent volume by using individualized CT angiography protocols. Read more

Case: Evaluation of Williams-Beuren Syndrome in a Two-month-old Child using a Single Rotation Scan Mode

posted by dsct.com | Jun 21, 2016
dsct.com

CT scans are routinely used for cardiovascular evaluations. In this case, the CT images clearly showed a significant stenosis of the ascending aorta directly above the aortic root. Read more

Coronary CT angiography derived morphological and functional quantitative plaque markers correlated with invasive fractional flow reserve for detecting hemodynamically significant stenosis.

posted by U. Joseph Schoepf, M.D. | Jun 14, 2016
U. Joseph Schoepf, M.D.

Objective: Compare morphological and functional coronary plaque markers derived from coronary CT angiography (CCTA) for their ability to detect lesion-specific ischemia. Read more

Case: Discovery of a Type II Endoleak after EVAR in a Patient with Renal Insufficiency using Dynamic 4D CT Angiography

posted by DSCT.com editors | Jun 10, 2016
DSCT.com editors

A 72-year-old male patient with poor kidney function (GFR 40 mL/min) was admitted to the hospital with a suspected endoleak after an endovascular aneurysm repair (EVAR) of the abdominal aorta. A dynamic 4D CT angiography (CTA) was requested to confirm the endoleak and to specify its type. Read more

Optimization of window settings for virtual monoenergetic imaging in dual-energy CT of the liver: A multi-reader evaluation of standard monoenergetic and advanced imaged-based monoenergetic datasets.

posted by Carlo Nicola De Cecco, M.D., PhD | Jun 7, 2016
Carlo Nicola De Cecco, M.D., PhD

Objectives: To evaluate optimal window settings for display of virtual monoenergetic reconstructions in third-generation dual-source, dual-energy computed tomography (DECT) of the liver. Read more

A noise-optimized virtual monochromatic reconstruction algorithm improves stent visualization and diagnostic accuracy for detection of in-stent re-stenosis in lower extremity run-off CT angiography.

posted by Carlo Nicola De Cecco, M.D., PhD | Jun 3, 2016
Carlo Nicola De Cecco, M.D., PhD

Purpose: To evaluate the impact of noise-optimized virtual monochromatic imaging (VMI+) on stent visualization and accuracy for in-stent re-stenosis at lower extremity dual-energy CT angiography (DE-CTA). Read more

High Atomic Number Contrast Media Offer Potential for Radiation Dose Reduction in Contrast- Enhanced Computed Tomography

posted by dsct.com | May 31, 2016
dsct.com

Objectives: Spectral optimization of x-ray computed tomography (CT) has led to substantial radiation dose reduction in contrast-enhanced CT studies using standard iodinated contrast media. The purpose of this study was to analyze the potential for further dose reduction using high-atomic-number elements such as hafnium and tungsten. Read more

Image quality, radiation dose and diagnostic accuracy of 70 kVp whole brain volumetric CT perfusion imaging: a preliminary study.

posted by U. Joseph Schoepf, M.D. | May 27, 2016
U. Joseph Schoepf, M.D.

Purpose: To evaluate image quality and diagnostic accuracy for acute infarct detection and radiation dose of 70 kVp whole brain CT perfusion (CTP) and CT angiography (CTA) reconstructed from CTP source data. Read more

Characterization of Urinary Stone Composition by Use of Third-Generation Dual-Source Dual- Energy CT With Increased Spectral Separation

posted by dsct.com | May 17, 2016
dsct.com

Objective: The purpose of this phantom study was to determine the utility of a third-generation dual-source CT scanner with increased dual-energy spectral separation in differentiating urinary stone composition. Read more

Third-generation dual-source CT of the neck using automated tube voltage adaptation in combination with advanced modeled iterative reconstruction: evaluation of image quality and radiation dose

posted by Julian L. Wichmann, M.D. | May 13, 2016
Julian L. Wichmann, M.D.

Purpose: To evaluate image quality and radiation dose in third-generation dual-source computed tomography (DSCT) of the neck using automated tube voltage adaptation (TVA) with advanced modelled iterative reconstruction (ADMIRE) algorithm. Read more

Detection and size measurements of pulmonary nodules in ultra-low-dose CT with iterative reconstruction compared to low dose CT.

posted by U. Joseph Schoepf, M.D. | May 10, 2016
U. Joseph Schoepf, M.D.

Background: In this study, the accuracy of ultra-low-dose computed tomography (CT) with iterative reconstruction (IR) for detection and measurement of pulmonary nodules was evaluated. Read more

Semiautomated Global Quantification of Left Ventricular Myocardial Perfusion at Stress Dynamic CT: Diagnostic Accuracy for Detection of Territorial Myocardial Perfusion Deficits Compared to Visual Assessment.

posted by Carlo Nicola De Cecco, M.D., PhD | May 6, 2016
Carlo Nicola De Cecco, M.D., PhD

Rationale and Objectives: To evaluate the diagnostic accuracy of semiautomated global quantification of left ventricular myocardial perfusion derived from stress dynamic computed tomography myocardial perfusion imaging (CTMPI) for detection of territorial perfusion deficits (PD). Read more

Approaches to ultra-low radiation dose coronary artery calcium scoring based on 3rd generation dual-source CT: A phantom study.

posted by Carlo Nicola De Cecco, M.D., PhD | May 3, 2016
Carlo Nicola De Cecco, M.D., PhD

Objectives: To investigate to what extent 3rd generation dual-source computed tomography (DSCT) can reduce radiation dose in coronary artery calcium scoring. Read more

Prospectively ECG-triggered high-pitch 80kVp coronary computed tomography angiography with 30mL of 270mg per mL contrast material and iterative reconstruction.

posted by U. Joseph Schoepf, M.D. | May 1, 2016
U. Joseph Schoepf, M.D.

Purpose: To investigate the feasibility of prospectively ECG-triggered high-pitch CCTA using 30mL of 270mg I/mL contrast material, 80kVp, and iterative reconstruction (IR). Read more

Evaluation of different keV-settings in dual-energy CT angiography of the aorta using advanced image-based virtual monoenergetic imaging.

posted by Julian L. Wichmann, M.D. | Apr 30, 2016
Julian L. Wichmann, M.D.

To compare quantitative image quality in dual-energy CT angiography (DE-CTA) studies of the aorta using different virtual monoenergetic imaging (MEI) and advanced image-based virtual monoenergetic (MEI+) settings at varying kiloelectron volt (keV) levels. Read more

Very low-dose (0.15 mGy) chest CT protocols using the COPDGene 2 test object and a third-generation Dual-Source CT scanner with corresponding third-generation iterative reconstruction software.

posted by dsct.com | Apr 28, 2016
dsct.com

The purpose of this study was to evaluate the impact of ultralow radiation dose single-energy computed tomographic (CT) acquisitions with Sn prefiltration and third-generation iterative reconstruction on density-based quantitative measures of growing interest in phenotyping pulmonary disease. Read more

Novel iterative reconstruction method with optimal dose usage for partially redundant CT-acquisition

posted by dsct.com | Apr 22, 2016
dsct.com

In CT imaging, a variety of applications exist which are strongly SNR limited. However, in some cases redundant data of the same body region provide additional quanta. Read more

Metal Artifact Reduction in Pelvic Computed Tomography With Hip Prostheses: Comparison of Virtual Monoenergetic Extrapolations From Dual-Energy Computed Tomography and an Iterative Metal Artifact Reduction Algorithm in a Phantom Study.

posted by Hatem Alkadhi, M.D., M.P.H., E.B.C.R. | Apr 18, 2016
Hatem Alkadhi, M.D., M.P.H., E.B.C.R.

The aim of this study was to directly compare metal artifact reduction (MAR) of virtual monoenergetic extrapolations (VMEs) from dual-energy computed tomography (CT) with iterative MAR (iMAR) from single energy in pelvic CT with hip prostheses. Read more

Effect of Automated Attenuation-based Tube Voltage Selection on Radiation Dose at CT: An Observational Study on a Global Scale.

posted by Carlo Nicola De Cecco, M.D., PhD | Apr 16, 2016
Carlo Nicola De Cecco, M.D., PhD

Purpose: To evaluate the effect of automated tube voltage selection (ATVS) on radiation dose at computed tomography (CT) worldwide encompassing all body regions and types of CT examinations. Read more

CT of the Abdomen with Reduced Tube Voltage in Adults: A Practical Approach

posted by dsct.com | Apr 11, 2016
dsct.com

Recent innovations in computed tomographic (CT) hardware and software have allowed implementation of low tube voltage imaging into everyday CT scanning protocols in adults. Read more

Case: Ultra-fast Low-dose Coronary CTA at 0.37 mSv and with 35 mL Contrast Agent

posted by Julian L. Wichmann, M.D. | Apr 9, 2016
Julian L. Wichmann, M.D.
  • 2015-12-09_tabelle_5

A 77-year-old male patient, with multiple risk factors including hypertension, hyperlipidemia, and history of cigarette smoking, was admitted with recent onset of chest discomfort and shortness of breath at rest. cCTA images demonstrated an approximately 50% stenosis of the mid LAD segment and mid CX without LM stenosis. Read more

Image Quality of 3rd Generation Spiral Cranial Dual-Source CT in Combination with an Advanced Model Iterative Reconstruction Technique: A Prospective Intra-Individual Comparison Study to Standard Sequential Cranial CT Using Identical Radiation Dose

posted by Thomas Henzler, MD | Apr 7, 2016
Thomas Henzler, MD

Objectives: To prospectively intra-individually compare image quality of a 3rd generation Dual-Source-CT (DSCT) spiral cranial CT (cCT) to a sequential 4-slice Multi-Slice-CT (MSCT) while maintaining identical intra-individual radiation dose levels. Read more

Characteristic image quality of a third generation dual-source MDCT scanner: Noise, resolution, and detectability.

posted by dsct.com | Apr 3, 2016
dsct.com

Purpose: To assess the inherent image quality characteristics of a new multidetector computed tomography system in terms of noise, resolution, and detectability index as a function of image acquisition and reconstruction for a range of clinically relevant settings. Read more

Automated tube voltage selection for radiation dose and contrast medium reduction at coronary CT angiography using 3rd generation dual-source CT.

posted by Carlo Nicola De Cecco, M.D., PhD | Apr 1, 2016
Carlo Nicola De Cecco, M.D., PhD

Objectives: To investigate the relationship between automated tube voltage selection (ATVS) and body mass index (BMI) and its effect on image quality and radiation dose of coronary CT angiography (CCTA). Read more

Individually tailored contrast enhancement in CT pulmonary angiography

posted by Marco Das, M.D. | Mar 30, 2016
Marco Das, M.D.

The purpose was to evaluate individually shaped contrast media (CM) delivery in CT pulmonary angiography (CTPA) for suspected pulmonary embolism (PE). Read more

Automated Tube Voltage Adaptation in Combination with Advanced Modeled Iterative Reconstruction in Thoracoabdominal Third-Generation 192-Slice Dual-Source Computed Tomography: Effects on Image Quality and Radiation Dose

posted by Julian L. Wichmann, M.D. | Mar 28, 2016
Julian L. Wichmann, M.D.

Rationale and Objectives: To evaluate image quality and radiation exposure of portal venous-phase thoracoabdominal third-generation 192-slice dual-source computed tomography (DSCT) with automated tube voltage adaptation (TVA) in combination with advanced modeled iterative reconstruction (ADMIRE). Read more

Case: Whole-Body CTA with Reduced Radiation Dose and only 20 mL of Contrast Media

posted by Thomas Henzler, MD | Mar 25, 2016
Thomas Henzler, MD
  • 2015-12-09_tabelle_3

A 70-year-old female patient was referred to our emergency department complaining about a new onset of back pain and malignant hypertension. The initially performed CTA, on a 16-slice single source CT with 100 mL contrast media, revealed a Stanford B dissection. The patient was again referred to our department for … Read more

Prospectively ECG-triggered high-pitch coronary angiography with third-generation dual-source CT at 70 kVp tube voltage: feasibility, image quality, radiation dose, and effective of iterative reconstruction.

posted by Michael M. Lell, M.D. | Mar 23, 2016
Michael M. Lell, M.D.

Objective: We evaluated feasibility, image quality (IQ), and radiation dose of coronary CTA using a third-generation dual-source CT system capable of producing 450 mAs tube current at 70 kVp tube voltage. Read more

Advanced virtual monoenergetic images: improving the contrast of dual-energy CT pulmonary angiography.

posted by Hatem Alkadhi, M.D., M.P.H., E.B.C.R. | Mar 16, 2016
Hatem Alkadhi, M.D., M.P.H., E.B.C.R.

Purpose: To investigate the value of advanced virtual monoenergetic image reconstruction (mono-plus) from dual-energy computed tomography (CT) for improving the contrast of CT pulmonary angiography (CTPA). Read more

Case: CT Volume Perfusion Imaging in a Case of Suspected Pancreatic Cancer

posted by Thomas Henzler, MD | Mar 11, 2016
Thomas Henzler, MD
  • 2015-12-09_tabelle_2

A 62-year-old male patient presented to the hospital, complaining of persistent upper abdominal pain which was exacerbated after intake of fatty foods. CT images revealed a hypodense lesion, measuring 6.4 × 3.2 cm, in the corpus of the pancreas. Read more

Dual-energy CT of the pancreas: improved carcinoma-to-pancreas contrast with a noiseoptimized monoenergetic reconstruction algorithm.

posted by Julian L. Wichmann, M.D. | Mar 9, 2016
Julian L. Wichmann, M.D.

Purpose: To evaluate a novel monoenergetic reconstruction algorithm (nMERA) with improved noise reduction for dual-energy CT (DECT) of pancreatic adenocarcinoma. Read more

Next generation coronary CT angiography: in vitro evaluation of 27 coronary stents.

posted by dsct.com | Mar 8, 2016
dsct.com

Objectives: To evaluate in-stent lumen visibility of 27 modern and commonly used coronary stents (16 individual stent types, two stents at six different sizes each) utilizing a third-generation dual-source CT system. Read more

Computed Tomography Angiography With High Flow Rates: An In Vitro and In Vivo Feasibility Study

posted by Marco Das, M.D. | Mar 1, 2016
Marco Das, M.D.

The aims of this study were to test high-flow application of contrast media (CM) using novel high-flow needles and to assess injection- and flow-related parameters in a circulation phantom and in an in vivo population. Read more

From 3D to 4D: Integration of temporal information into CT angiography studies

posted by Thomas Henzler, MD | Feb 26, 2016
Thomas Henzler, MD

CT angiography is the current clinical standard for the imaging many vascular illnesses. The aim of this article is to highlight the clinical possibilities of dynamic CTA using 2 examples. Read more

Prospectively ECG-Triggered Sequential Dual-Source Coronary CT Angiography in Patients with Atrial Fibrillation: Influence of Heart Rate on Image Quality and Evaluation of Diagnostic Accuracy.

posted by U. Joseph Schoepf, M.D. | Feb 22, 2016
U. Joseph Schoepf, M.D.

Objective: To evaluate the effects of mean heart rate (HR) and heart rate variation (HRV) on image quality and diagnostic accuracy of prospectively ECG-triggered sequential dual-source coronary CT angiography (CCTA) in patients with atrial fibrillation (AF). Read more

Ultralow-Dose CT with Tin-Filtration for Detection of Solid and Sub-solid Pulmonary Nodules: A phantom study

posted by Hatem Alkadhi, M.D., M.P.H., E.B.C.R. | Feb 18, 2016
Hatem Alkadhi, M.D., M.P.H., E.B.C.R.

Purpose: To investigate diagnostic performance of advanced modelled iterative reconstruction (ADMIRE) to filtered back projection (FBP) when using an ultra-low dose protocol for the detection of solid and sub-solid pulmonary-nodules. Read more

Comparison of quantitative stenosis characteristics at routine coronary computed tomography angiography with invasive fractional flow reserve for assessing lesion-specific ischemia.

posted by U. Joseph Schoepf, M.D. | Feb 16, 2016
U. Joseph Schoepf, M.D.

Objective: To comprehensively evaluate quantitative parameters derived from routine coronary CT angiography (cCTA) for predicting lesion-specific ischemia in comparison to invasive fractional flow reserve (FFR). Read more

Dual-Energy Computed Tomography Angiography of the Lower Extremity Runoff: Impact of Noise-Optimized Virtual Monochromatic Imaging on Image Quality and Diagnostic Accuracy

posted by Julian L. Wichmann, M.D. | Feb 12, 2016
Julian L. Wichmann, M.D.

The aim of this study was to evaluate the impact of a noise-optimized virtual monochromatic imaging algorithm (VMI+) on image quality and diagnostic accuracy at dual-energy computed tomography angiography (CTA) of the lower extremity runoff. Read more

Diagnostic value of quantitative stenosis predictors with coronary CT angiography compared to invasive fractional flow reserve.

posted by U. Joseph Schoepf, M.D. | Feb 10, 2016
U. Joseph Schoepf, M.D.

Objective: To evaluate the diagnostic performance of CCTA-derived stenosis predictors including CT-FFR for the detection of ischemia-inducing stenosis compared to invasive FFR. Read more

Diagnostic performance of an advanced modeled iterative reconstruction algorithm for lowcontrast detectability on a third-generation Dual-Source MDCT scanner: Potential for radiation dose reduction in a multi reader study.

posted by dsct.com | Feb 8, 2016
dsct.com

Purpose: To assess the effect of radiation dose reduction on low-contrast detectability by using an advanced modeled iterative reconstruction (ADMIRE; Siemens Healthcare, Forchheim, Germany) algorithm in a contrast-detail phantom with a thirdgeneration dual-source multidetector computed tomography (CT) scanner. Read more

Advanced Modeled Iterative Reconstruction in Low-Tube-Voltage Contrast-Enhanced Neck CT: Evaluation of Objective and Subjective Image Quality

posted by Julian L. Wichmann, M.D. | Feb 5, 2016
Julian L. Wichmann, M.D.

Dose-saving techniques in neck CT cause increased image noise that can be counteracted by iterative reconstruction. Our aim was to evaluate the image quality of advanced modeled iterative reconstruction (ADMIRE) in contrast-enhanced low-tubevoltage neck CT. Read more

Low-Volume Contrast Medium Protocol for Comprehensive Cardiac and Aortoiliac CT Assessment in the Context of Transcatheter Aortic Valve Replacement.

posted by U. Joseph Schoepf, M.D. | Jan 26, 2016
U. Joseph Schoepf, M.D.

Rationale and Objectives: To investigate the diagnostic performance of a comprehensive computed tomography (CT) protocol for both cardiac and aortoiliac evaluation of patients considered for transcatheter aortic valve replacement (TAVR) using a single, low-volume contrast medium (CM) injection. Read more

Performance of today’s dual energy CT and future multi energy CT in virtual non-contrast imaging and in iodine quantification: A simulation.

posted by Michael M. Lell, M.D. | Jan 21, 2016
Michael M. Lell, M.D.

To study the performance of different dual energy computed tomography (DECT) techniques, which are available today, and future multi energy CT (MECT) employing novel photon counting detectors in an image-based material decomposition task. Read more

Absolute Versus Relative Myocardial Blood Flow by Dynamic CT Myocardial Perfusion Imaging in Patients With Anatomic Coronary Artery Disease.

posted by U. Joseph Schoepf, M.D. | Jan 18, 2016
U. Joseph Schoepf, M.D.

Objective: The purpose of this study was to evaluate differences in the diagnostic accuracy of absolute and relative territorial myocardial blood flow (MBF) derived from stress dynamic CT myocardial perfusion imaging (MPI) for the detection of significant coronary artery stenosis. Read more

The importance of spectral separation: an assessment of dual-energy spectral separation for quantitative ability and dose efficiency.

posted by dsct.com | Jan 14, 2016
dsct.com

One method to acquire dual-energy (DE) computed tomography (CT) data is to perform CT scans at 2 different x-ray tube voltages, typically 80 and 140 kV, either as 2 separate scans, by means of rapid kV switching, or with the use of 2 x-ray sources as in dual-source CT (DSCT) … Read more

Application of an Advanced Image-Based Virtual Monoenergetic Reconstruction of Dual Source Dual-Energy CT Data at Low keV Increases Image Quality for Routine Pancreas Imaging.

posted by U. Joseph Schoepf, M.D. | Jan 12, 2016
U. Joseph Schoepf, M.D.

Purpose: To compare image quality on contrast-enhanced dual-energy computed tomography (DECT) during the pancreatic parenchymal phase of pancreatic masses between linearly-blended simulated 120 kVp images (routine) and advanced image-based virtual monoenergetic reconstructions at 55 keV. Read more

Predictive value of low tube voltage and dual-energy CT for successful shock wave lithotripsy: an in vitro study

posted by Hatem Alkadhi, M.D., M.P.H., E.B.C.R. | Jan 8, 2016
Hatem Alkadhi, M.D., M.P.H., E.B.C.R.

This study investigates the capabilities of low tube voltage computed tomography (CT) and dual-energy CT (DECT) for predicting successful shock wave lithotripsy (SWL) of urinary stones in vitro. Read more

State of the Art: Iterative CT Reconstruction Techniques.

posted by U. Joseph Schoepf, M.D. | Jan 5, 2016
U. Joseph Schoepf, M.D.

Owing to recent advances in computing power, iterative reconstruction (IR) algorithms have become a clinically viable option in computed tomographic (CT) imaging. Read more

Where do we stand? Functional imaging in acute and chronic pulmonary embolism with state-of-the-art CT.

posted by Thomas Henzler, MD | Dec 28, 2015
Thomas Henzler, MD

Nowadays, CT pulmonary angiography (CTPA) is the diagnostic imaging modality of choice for acute and chronic pulmonary embolism (PE) in order to assess vascular anatomy and parenchymal morphology. Read more

Dual-energy snap-shot perfusion CT in suspect pulmonary nodules and masses and for lung cancer staging

posted by dsct.com | Dec 22, 2015
dsct.com

Dual energy computed tomography (DECT) has proven its clinical usefulness for improved tissue characterization within the past years. Read more

Case: Volume perfusion CT in liver metastases

posted by Michael M. Lell, M.D. | Dec 18, 2015
Michael M. Lell, M.D.

Volume perfusion CT in liver metastases Read more

Coronary CT angiography using low concentrated contrast media injected with high flow rates: Feasible in clinical practice

posted by Marco Das, M.D. | Dec 11, 2015
Marco Das, M.D.

Aim of this study was to test the hypothesis that peak injection pressures and image quality using low concentrated contrast media (CM) (240mg/mL) injected with high flow rates will be comparable to a standard injection protocol (CM: 300mg/mL) in coronary computed tomographic angiography (CCTA). Read more

Case: Aortic dissection with outstanding potential to minimize use of contrast agent

posted by Thomas Henzler, MD | Dec 1, 2015
Thomas Henzler, MD

Aortic dissection with outstanding potential to minimize use of contrast agent Read more

Cardiovascular imaging in pediatric patients using dual source CT

posted by Ronald Booij | Nov 20, 2015
Ronald Booij

Cardiovascular CT acquisition protocol optimization in pediatric patients, including newborns is often challenging. Read more

Case: Coronary CTA with multiple stents in the LAD and the CX at a low dose

posted by Stephan Achenbach, M.D. | Nov 13, 2015
Stephan Achenbach, M.D.

Coronary CTA with multiple stents in the LAD and the CX at a low dose Read more

Case: Coronary CTA for trans-catheter aortic valve implantation/replacement with 40 ml contrast agent

posted by Stephan Achenbach, M.D. | Nov 6, 2015
Stephan Achenbach, M.D.

Coronary CTA for trans-catheter aortic valve implantation/replacement with 40 ml contrast agent Read more

Impact of an advanced image-based monoenergetic reconstruction algorithm on coronary stent visualization using third generation dual-source dual-energy CT: a phantom study.

posted by U. Joseph Schoepf, M.D. | Oct 27, 2015
U. Joseph Schoepf, M.D.

To evaluate the impact of an advanced monoenergetic (ME) reconstruction algorithm on CT coronary stent imaging in a phantom model. Read more

Case: Coronary CTA: low dose sequence in circumflex artery stenosis

posted by Stephan Achenbach, M.D. | Oct 20, 2015
Stephan Achenbach, M.D.
  • 03_Low dose coronary CTA
  • 02_Low dose coronary CTA
  • 01_Low dose coronary CTA
  • Low dose coronary CTA

Coronary CTA: low dose sequence in circumflex artery stenosis Read more

Case: Dual Energy CT: identifying both uric acid and calcium oxalate kidney stones

posted by Michael M. Lell, M.D. | Oct 9, 2015
Michael M. Lell, M.D.
  • Tabelle

Dual Energy CT: identifying both uric acid and calcium oxalate kidney stones Read more

Image quality, radiation dose, and diagnostic accuracy of prospectively ECG-triggered high-pitch coronary CT angiography at 70 kVp in a clinical setting: comparison with invasive coronary angiography.

posted by U. Joseph Schoepf, M.D. | Oct 6, 2015
U. Joseph Schoepf, M.D.

Purpose: To investigate image quality, radiation dose, and diagnostic performance of prospectively ECG-triggered high-pitch coronary CT angiography (CCTA) at 70 kVp compared to invasive coronary angiography (ICA) as reference standard. Read more

Iterative reconstruction

posted by Ronald Booij | Sep 30, 2015
Ronald Booij

Iterative reconstruction has been made available for practical use in the last few years. Iterative reconstruction techniques (IR) can increase image quality with equal dose or potentially get similar image quality as in filtered back-projection (FBP) with less dose. Read more

Beyond Stenosis Detection: CT Approaches for Determining the Functional Relevance of Coronary Artery Disease

posted by Carlo Nicola De Cecco, M.D., PhD | Sep 1, 2015
Carlo Nicola De Cecco, M.D., PhD

Different CT techniques for the functional analysis of coronary lesions have recently emerged, including static and dynamic CT myocardial perfusion imaging and CT-based fractional flow reserve and transluminal attenuation gradient methods. Read more

Influence of technical parameters on epicardial fat volume quantification at cardiac CT

posted by Carlo Nicola De Cecco, M.D., PhD | Aug 24, 2015
Carlo Nicola De Cecco, M.D., PhD

Measured EATV can differ substantially between contrast enhanced and non-contrast CT studies, which can be reconciled by threshold modification. Heart cycle phase does not significantly influence EATV measurements. Read more

CT of acute pulmonary embolism: state-of-the-art

posted by U. Joseph Schoepf, M.D. | Aug 18, 2015
U. Joseph Schoepf, M.D.

This review will discuss the technical improvements for imaging peripheral pulmonary arteries, the methods of assessing pulmonary embolism (PE) severity based on CT findings, a multidetector CT technique for PE detection, and more. Read more

Optimizing contrast media injection protocols in state-of-the art CT angiography

posted by Michael M. Lell, M.D. | Aug 12, 2015
Michael M. Lell, M.D.

The optimization of CM injection protocols is mandatory to achieve state-of the art CTA at low kilovolt and can reduce CM doses to patients. Read more

CT myocardial perfusion imaging

posted by Carlo Nicola De Cecco, M.D., PhD | Aug 7, 2015
Carlo Nicola De Cecco, M.D., PhD

This review provides a systematic overview of the presently available approaches for the assessment of myocardial perfusion at CT, including diagnostic accuracy and limitations. Read more

CT Evaluation of Small-Diameter Coronary Artery Stents: Effect of an Integrated Circuit Detector with Iterative Reconstruction

posted by U. Joseph Schoepf, M.D. | Aug 4, 2015
U. Joseph Schoepf, M.D.

The implementation of an integrated-circuit CT detector provides substantially sharper out-of-plane resolution of coronary artery stents at 0.5-mm section thickness, while the use of iterative image reconstruction mostly improves in-plane stent visualization. Read more

Automated tube voltage selection in thoracoabdominal CT at high pitch using a third-generation dual-source scanner: image quality and radiation dose performance

posted by Michael M. Lell, M.D. | Jul 29, 2015
Michael M. Lell, M.D.

Automated tube voltage adaptation combined with high-pitch protocols allows for a substantial radiation dose reduction while substantially increasing the image quality, even at large-volume exposure. Read more

Dual-energy CT behavior of heroin, cocaine, and typical adulterants

posted by Sebastian Leschka, M.D. | Jul 24, 2015
Sebastian Leschka, M.D.

The different DEIs of bodypacks containing cocaine and heroin allow them to be distinguished with dual-energy CT. Read more

Ultralow-Radiation-Dose Chest CT: Accuracy for Lung Densitometry and Emphysema Detection

posted by U. Joseph Schoepf, M.D. | Jul 21, 2015
U. Joseph Schoepf, M.D.

The purpose of this study was to determine whether ultralow-radiation-dose chest CT can be used for quantification of lung density and for emphysema detection in participants undergoing lung cancer screening. Read more

Dual energy CT: how well can pseudo-monochromatic imaging reduce metal artifacts?

posted by Michael M. Lell, M.D. | Jul 15, 2015
Michael M. Lell, M.D.

Pseudo-monochromatic imaging is able to reduce beam hardening, scatter, and metal artifacts in some cases but it cannot remove them. Read more

Technical prerequisites and imaging protocols for dynamic and dual energy myocardial perfusion imaging

posted by Sebastian Leschka, M.D. | Jul 10, 2015
Sebastian Leschka, M.D.

The combination of CCTA morphological assessment and CTMPI functional evaluation holds promise for achieving a comprehensive assessment of coronary artery anatomy and myocardial perfusion using a single image modality. Read more

Effect of reduced x-ray tube voltage, low iodine concentration contrast medium, and sinogram-affirmed iterative reconstruction on image quality and radiation dose at coronary CT angiography: Results of the prospective multicenter REALISE trial

posted by U. Joseph Schoepf, M.D. | Jul 7, 2015
U. Joseph Schoepf, M.D.

Using low x-ray tube voltage and IR allows for decreasing the iodine load and effective radiation dose at CCTA while maintaining image quality. Read more

Imaging the Parasinus Region with a Third-Generation Dual-Source CT and the Effect of Tin Filtration on Image Quality and Radiation Dose

posted by Michael M. Lell, M.D. | Jul 1, 2015
Michael M. Lell, M.D.

CT is the imaging technique of choice in the evaluation of midface trauma or inflammatory disease. We performed a systematic evaluation of scan protocols to optimize image quality and radiation exposure. High resolution 3D imaging can be performed at a dose level comparable to conventional radiography. Read more

Automated attenuation-based tube voltage selection for body CTA: Performance evaluation of 192-slice DSCT

posted by Sebastian Leschka, M.D. | Jun 26, 2015
Sebastian Leschka, M.D.

To assess radiation dose and image quality in body CTA with automated ATVS on a 192-slice DSCT. Read more

Assessment of an Advanced Monoenergetic Reconstruction Technique in Dual-Energy CT of Head and Neck Cancer

posted by Julian L. Wichmann, M.D. | Jun 17, 2015
Julian L. Wichmann, M.D.

Mono + DECT at low keV levels significantly improves CNR and subjective image quality in patients with head and neck SCC, as tumour CNR peaks at 40 keV, and 55 keV images are preferred by observers. Read more

Energy Limits in Second Generation High-pitch Dual Source CT – Comparison in an Upper Abdominal Phantom

posted by Josef Matthias Kerl, M.D. | Jun 12, 2015
Josef Matthias Kerl, M.D.

The aim of our study was to find out how much energy is applicable in second-generation dual source high-pitch CT in imaging of the abdomen. Read more

Objective and subjective image quality of primary and recurrent squamous cell carcinoma on head and neck low-tube-voltage 80-kVp CT

posted by Julian L. Wichmann, M.D. | Jun 8, 2015
Julian L. Wichmann, M.D.

To investigate low-tube-voltage 80-kVp computed tomography (CT) of head and neck primary and recurrent squamous cell carcinoma (SCC) regarding objective and subjective image quality. Read more

Cardiac CT angiography for device surveillance after endovascular left atrial appendage closure

posted by Savvas Nicolaou, M.D. | Jun 4, 2015
Savvas Nicolaou, M.D.

CCTA appears to be a feasible alternative to transoesophageal echocardiography for post-LAA device surveillance to evaluate for device thrombus, residual leak, embolization, position, and pericardial effusion. Read more

CT of dynamic changes of the aortic root during systole and diastole in patients with coronary artery calcification

posted by Julian L. Wichmann, M.D. | May 30, 2015
Julian L. Wichmann, M.D.

This study was done to investigate the dynamic changes of the aortic root during systole and diastole in patients with coronary artery calcification (CAC) using DSCT. Read more

The dream of a one-stop-shop: Meta-analysis on myocardial perfusion CT

posted by Rozemarijn Vliegenthart, M.D., PhD | May 27, 2015
Rozemarijn Vliegenthart, M.D., PhD

This meta-analysis shows considerable variation in techniques and reference standards for CT of myocardial blood supply. While CT seems sensitive and specific for evaluation of hemodynamically relevant CAD, studies so far are limited in size. Standardization of myocardial perfusion CT technique is essential. Read more

Dual-Energy CT: What the Neuroradiologist Should Know

posted by Marco Das, M.D. | May 22, 2015
Marco Das, M.D.

With the introduction of dual-energy CT (DECT) in neuroradiology, imaging of various important indications shifted back from MRI to CT and new indications for CT scanning were emerged. Read more

Dual-Energy CT: Applications in Abdominal Imaging

posted by Ralf Bauer, M.D. | May 20, 2015
Ralf Bauer, M.D.

This article is supposed to give a current update on possible applications of DECT in the abdomen and their evidence. Read more

Image quality and radiation dose of lower extremity CT angiography using 70 kVp, high pitch acquisition and sinogram-affirmed iterative reconstruction

posted by U. Joseph Schoepf, M.D. | May 17, 2015
U. Joseph Schoepf, M.D.

The purpose of this study was to assess image quality and radiation dose of lower extremity CTA with 70 kVp, high pitch acquisition and SAFIRE. Read more

Image quality and radiation dose of lower extremity CT angiography at 70 kVp on an integrated circuit detector DSCT

posted by U. Joseph Schoepf, M.D. | May 11, 2015
U. Joseph Schoepf, M.D.

To compare the image quality and radiation dose of lower extremity CTA at 70 kVp using a dual-source CT system with an integrated circuit detector to similar studies at 120 kVp. Read more

Non-linear image blending improves visualization of head and neck primary squamous cell carcinoma compared to linear blending in dual-energy CT

posted by Julian L. Wichmann, M.D. | May 4, 2015
Julian L. Wichmann, M.D.

Post-processing of DECT using a non-linear blending technique provides improved objective and subjective image quality of head and neck SCC compared to linearly blended images series. Read more

Reduced radiation dose and improved image quality at cardiovascular CT angiography by automated attenuation-based tube voltage selection: intra-individual comparison

posted by U. Joseph Schoepf, M.D. | May 1, 2015
U. Joseph Schoepf, M.D.

To evaluate the effect of automated tube voltage selection on radiation dose and image quality at cardiovascular CTA. Read more

Dual-Source CT Imaging to Plan Transcatheter Aortic Valve Replacement: Accuracy for Diagnosis of Obstructive Coronary Artery Disease

posted by Carlo Nicola De Cecco, M.D., PhD | Apr 27, 2015
Carlo Nicola De Cecco, M.D., PhD

To assess the accuracy of CT examinations performed for the purpose of transcatheter aortic valve replacement. Read more

70 kVp CTPA: Potential for Reduction of Iodine Load and Radiation Dose

posted by Julian L. Wichmann, M.D. | Apr 24, 2015
Julian L. Wichmann, M.D.

The purpose of the study was to evaluate 70 kVp dual-source CTPA with reduced iodine load in comparison with single-source 70 and 100 kVp CTPA with standard iodine load regarding image quality and radiation dose. Read more

High-pitch CT pulmonary angiography with iterative reconstruction at 80 kVp and 20 mL contrast agent volume

posted by U. Joseph Schoepf, M.D. | Apr 21, 2015
U. Joseph Schoepf, M.D.

To evaluate the image quality, radiation dose and diagnostic accuracy of 80kVp, high-pitch CTPA with iterative reconstruction using 20 ml of contrast agent. Read more

ECG-Synchronized CT Angiography in 324 Consecutive Pediatric Patients: Spectrum of Indications and Trends in Radiation Dose

posted by Thomas Henzler, MD | Apr 13, 2015
Thomas Henzler, MD

The aim of the study is to describe the spectrum of indications for pediatric ECG-synchronized CT angiography (CTA), the main determinants of radiation exposure, and trends in radiation dose over time at a single, tertiary referral center. Read more

Comparison of diagnostic value of a novel noninvasive coronary CT angiography method versus standard coronary angiography for assessing fractional flow reserve

posted by U. Joseph Schoepf, M.D. | Apr 7, 2015
U. Joseph Schoepf, M.D.

In conclusion, the CT-based FFR algorithm evaluated here outperforms standard evaluation of cCTA for the detection of hemodynamically significant stenoses while allowing on-site application within clinically viable time frames. Read more

High-pitch coronary CT angiography at 70 kVp with low contrast medium volume: comparison of 80 and 100 kVp high-pitch protocols

posted by Carlo Nicola De Cecco, M.D., PhD | Apr 1, 2015
Carlo Nicola De Cecco, M.D., PhD

The purpose of this article is to evaluate image quality and radiation dose of prospectively ECG-triggered high-pitch coronary CT angiography at 70 kVp and 30 mL contrast medium. Read more

Quantitative dual-energy CT for phantomless evaluation of cancellous bone mineral density of the vertebral pedicle: correlation with pedicle screw pull-out strength

posted by Julian L. Wichmann, M.D. | Mar 27, 2015
Julian L. Wichmann, M.D.

To evaluate quantitative DECT for phantomless analysis of cancellous BMD of vertebral pedicles and to assess the correlation with pedicle screw pull-out strength. Read more

Coronary CT angiography-derived fractional flow reserve correlated with invasive fractional flow reserve measurements – initial experience with a novel physician-driven algorithm

posted by U. Joseph Schoepf, M.D. | Mar 23, 2015
U. Joseph Schoepf, M.D.

The present study aimed to determine the feasibility of a novel fractional flow reserve (FFR) algorithm based on coronary CT angiography that permits point-of-care assessment, without data transfer to core laboratories, for the evaluation of potentially ischemia-causing stenoses. Read more

Correction of lumen contrast-enhancement influence on non-calcified coronary atherosclerotic plaque quantification on CT

posted by Rozemarijn Vliegenthart, M.D., PhD | Mar 19, 2015
Rozemarijn Vliegenthart, M.D., PhD

Lumen contrast-enhancement influences non-calcified atherosclerotic plaque Hounsfield-unit (HU) values in CT. This study aimed to construct and validate an algorithm to correct for this influence. Read more

Advanced modelled iterative reconstruction for abdominal CT: Qualitative and quantitative evaluation

posted by Hatem Alkadhi, M.D., M.P.H., E.B.C.R. | Mar 13, 2015
Hatem Alkadhi, M.D., M.P.H., E.B.C.R.

To determine qualitative and quantitative image-quality parameters in abdominal imaging using advanced modelled iterative reconstruction (ADMIRE) with third-generation dual-source 192 section CT. Read more

Artifacts in dual-energy CT gout protocol: a review of 50 suspected cases with an artifact identification guide

posted by Savvas Nicolaou, M.D. | Mar 10, 2015
Savvas Nicolaou, M.D.

The objective of our study was to discover the types and incidence of artifacts in dual-energy CT (DECT) using datasets of 50 consecutive patients who underwent a four-limb DECT protocol for the evaluation of suspected gout. Read more

Iterative image reconstruction techniques for CT coronary artery calcium quantification: comparison with traditional filtered back projection in vitro and in vivo

posted by Rozemarijn Vliegenthart, M.D., PhD | Mar 7, 2015
Rozemarijn Vliegenthart, M.D., PhD

To investigate in vitro and in vivo the use of image-based and raw data-based iterative reconstruction algorithms for quantification of coronary artery calcium by using the Agatston score and subsequent cardiac risk stratification. Read more

Case: Low dose cardiac scan with Definition Force

posted by U. Joseph Schoepf, M.D. | Mar 4, 2015
U. Joseph Schoepf, M.D.
  • Fig 1 Low dose cardiac scan with Definition Force
  • Fig 2 Low dose cardiac scan with Definition Force
  • Fig 3 Low dose cardiac scan with Definition Force
  • Fig 4 Low dose cardiac scan with Definition Force

We present the case of a patient examined with third-generation dual-source turbo flash coronary CT angiography with simultaneous application of multiple techniques to reduce radiation dose resulting in an effective dose of 0.37 mSv. Read more

Half-dose non-contrast CT in the investigation of urolithiasis: image quality improvement with third-generation integrated circuit CT detectors

posted by Savvas Nicolaou, M.D. | Mar 2, 2015
Savvas Nicolaou, M.D.

Third-generation IC detectors result in lower objective image noise at full- and half-radiation dose levels as compared with traditional DC detectors. Read more

Coronary Artery Calcification Scoring with State-of-the-Art CT Scanners from Different Vendors Has Substantial Effect on Risk Classification

posted by Rozemarijn Vliegenthart, M.D., PhD | Feb 27, 2015
Rozemarijn Vliegenthart, M.D., PhD

Among individuals at intermediate cardiovascular risk, state-of the-art CT scanners made by different vendors produced substantially different Agatston scores, which can result in reclassification of patients to the high- or low-risk categories in up to 6.5% of cases. Read more

Special image: Quadricuspid aortic valve with central, severe regurgitation

posted by Stephan Achenbach, M.D. | Feb 23, 2015

To view this exceptional image, click on title. Read more

Dual-energy CT increases reader confidence in the detection and diagnosis of hypoattenuating pancreatic lesions

posted by Savvas Nicolaou, M.D. | Feb 17, 2015
Savvas Nicolaou, M.D.

To prospectively compare detection and reader confidence of pancreatic lesions using a standard MDCT imaging protocol to a DECT imaging protocol with additional virtual non-contrast series. Read more

Interobserver variability of CT angiography for evaluation of aortic annulus dimensions prior to transcatheter aortic valve implantation (TAVI)

posted by Michael M. Lell, M.D. | Feb 13, 2015
Michael M. Lell, M.D.

Contrast-enhanced multidetector CT allows 3-D assessment of aortic annulus dimensions. Only limited data exist about its interobserver variability. Read more

Dual-energy CT virtual noncalcium algorithm for detection of bone marrow edema in acute fractures: early experiences

posted by Savvas Nicolaou, M.D. | Feb 10, 2015
Savvas Nicolaou, M.D.

Dual-energy CT may provide a convenient modality for further characterizing acute bony injury when MRI is not readily available. Read more

Case: Transposition of the Great Arteries (TGA) in a 3-year-old boy

posted by Ronald Booij | Feb 6, 2015
Ronald Booij

This article will focus on a challenging cardiac case: the transposition of the Great Arteries (TGA) in a 3-year-old boy. Read more

Hemodynamic significance of coronary stenosis by vessel attenuation measurement on CT compared with adenosine perfusion MRI

posted by Rozemarijn Vliegenthart, M.D., PhD | Feb 5, 2015
Rozemarijn Vliegenthart, M.D., PhD

We assessed the association between corrected contrast opacification (CCO) based on coronary computed tomography angiography (cCTA) and inducible ischemia by adenosine perfusion magnetic resonance imaging (APMR). Read more

Protocol aortic root CTA

posted by Gregor Pache, M.D. | Feb 3, 2015
Gregor Pache, M.D.

Please, click on the title to see the protocol. Read more

Contrast medium application in pediatric high-pitch cardiovascular CT angiography: manual or power injection?

posted by Michael M. Lell, M.D. | Jan 30, 2015
Michael M. Lell, M.D.

There is considerable controversy about the administration of contrast medium in infants and small children, with either a power injector or a manual (hand) injection. Read more

High pitch, low voltage dual source CT pulmonary angiography: assessment of image quality and diagnostic acceptability with hybrid iterative reconstruction

posted by Savvas Nicolaou, M.D. | Jan 27, 2015
Savvas Nicolaou, M.D.

Increased use of CT Pulmonary angiography in suspected pulmonary embolism (PE) has driven research to minimize radiation dose while maintaining image quality and diagnostic accuracy. Read more

Dose reduction in CT of the chest: image quality of iterative reconstructions at a 50% radiation dose compared to filtered back projection at a 100% radiation dose

posted by Michael M. Lell, M.D. | Jan 23, 2015
Michael M. Lell, M.D.

The aim of this study was to evaluate the potential of iterative reconstruction (IR) in chest CT to reduce radiation exposure. Read more

Single-portal-phase low-tube-voltage dual-energy CT for short-term follow-up of acute pancreatitis: evaluation of CT severity index, interobserver agreement and radiation dose

posted by Julian L. Wichmann, M.D. | Jan 20, 2015
Julian L. Wichmann, M.D.

Low-tube-voltage single-phase 100-kVp CT provides sufficient information for follow-up evaluation of acute pancreatitis and significantly reduces radiation exposure. Read more

Cardiac CT and echocardiographic evaluation of peri-device flow after percutaneous left atrial appendage closure using the AMPLATZER cardiac plug device

posted by Hatem Alkadhi, M.D., M.P.H., E.B.C.R. | Jan 16, 2015
Hatem Alkadhi, M.D., M.P.H., E.B.C.R.

The present study evaluates for the first time peri-device flow after LAA closure by AMPLATZER-Cardiac-Plug (ACP) using a combined cardiac-CT and TEE follow-up. Read more

Initial results of a new generation dual source CT system using only an in-plane comb filter for ultra-high resolution temporal bone imaging

posted by Thomas Henzler, MD | Jan 12, 2015
Thomas Henzler, MD

To prospectively evaluate radiation dose and image quality of a third generation dual-source CT (DSCT) without z-axis filter behind the patient for temporal bone CT. Read more

Case: Cusp thrombosis after transcatheter aortic valve replacement detected by CT and echocardiography

posted by Gregor Pache, M.D. | Jan 8, 2015
Gregor Pache, M.D.

An 86-year-old male underwent transcatheter aortic valve replacement (TAVR) for severe aortic stenosis with an Edwards Sapien 29 mm XT valve and percutaneous coronary intervention simultaneously. – with protocol! Read more

A pilot study on dual-energy CT for detection of urate deposits in renal transplant patients with asymptomatic hyperuricemia

posted by Savvas Nicolaou, M.D. | Jan 5, 2015
Savvas Nicolaou, M.D.

The objective of this study was to assess the prevalence of joint and renal monosodium urate deposits by DECT in asymptomatic hyperuricemia. Read more

Preoperative assessment of the aortic arch in children younger than 1 year with congenital heart disease: utility of low-dose high-pitch DSCT. A single-centre, retrospective analysis of 62 cases

posted by Stephan Achenbach, M.D. | Dec 31, 2014
Stephan Achenbach, M.D.

DSCT is a fast and appropriate imaging modality in the preoperative assessment of the aortic arch for surgical planning in CHD. Read more

Comparison of epicardial fat volume by CT in black versus white patients with acute chest pain

posted by Rozemarijn Vliegenthart, M.D., PhD | Dec 27, 2014
Rozemarijn Vliegenthart, M.D., PhD

We compared CT-derived volumes of epicardial adipose tissue (EAT), mediastinal adipose tissue (MAT), and pericoronary fat thickness (PFT) and correlations with CAD between black and white patients. Read more

Diagnostic performance of coronary CT angiography for stenosis detection according to calcium score: systematic review and meta-analysis

posted by Rozemarijn Vliegenthart, M.D., PhD | Dec 23, 2014
Rozemarijn Vliegenthart, M.D., PhD

A systematic review and meta-analysis to assess sensitivity and specificity of coronary CT angiography (CCTA) for significant stenosis at different degrees of coronary calcification. Read more

Oversizing in transcatheter aortic valve replacement, a commonly used term but a poorly understood one: dependency on definition and geometrical measurements

posted by Gregor Pache, M.D. | Dec 22, 2014
Gregor Pache, M.D.

The aim was to investigate the influence of geometrical parameters for calculation of relative oversizing in transcatheter aortic valve replacement, reported as percentage in relation to the native annulus size, to standardize reporting. Read more

Dual Energy Workshop coming up on May 7-8, 2015

posted by DSCT.com editors | Dec 22, 2014

May 7, 2015 to May 8, 2015. Physicians and technicians with basic knowledge will learn about state-of-the-art techniques for their clinical routine and gain insight on current and future developments. Read more

CT dose reduction using prospectively triggered or fast-pitch spiral technique employed in cardiothoracic imaging (the CT dose study)

posted by Sandra Simon Halliburton, Ph.D. | Dec 18, 2014
Sandra Simon Halliburton, Ph.D.

Use of advanced scanners facilitating prospectively triggered or high-pitch spiral scan modes results in marked dose reduction across a variety of cardiovascular studies, with no compromise in image quality. Read more

Can single-phase dual-energy CT reliably identify adrenal adenomas?

posted by Anno Graser, M. D. | Dec 15, 2014
Anno Graser, M. D.

Virtual non-contrast images derived from dual-energy-CT allow for accurate characterisation of lipid-rich adrenal adenomas and can help to avoid additional follow-up imaging. Read more

Dynamic myocardial CT perfusion imaging for evaluation of myocardial ischemia as determined by MR imaging

posted by Fabian Bamberg M.D., M.P.H. | Dec 12, 2014
Fabian Bamberg M.D., M.P.H.

The aim of this study was to determine the feasibility of CT-based dynamic myocardial perfusion imaging for the assessment of myocardial ischemia and infarction compared with cardiac magnetic resonance (CMR). Read more

Low-Tube-Voltage 80-kVp Neck CT: Evaluation of Diagnostic Accuracy and Interobserver Agreement

posted by Julian L. Wichmann, M.D. | Dec 10, 2014
Julian L. Wichmann, M.D.

Our aim was to evaluate the effects of low-tube-voltage 80-kV (peak) acquisitions for neck CT on diagnostic accuracy and interobserver agreement. Read more

Detection of occult, undisplaced hip fractures with a dual-energy CT algorithm targeted to detection of bone marrow edema

posted by Savvas Nicolaou, M.D. | Dec 6, 2014
Savvas Nicolaou, M.D.

The value of DECT-VNC primarily lies in its ability to help detect fractures which may be subtle or undetectable on bone reconstruction CT images. Read more

Accuracy of prospectively ECG-triggered very low-dose coronary dual-source CT angiography using iterative reconstruction for the detection of coronary artery stenosis: comparison with invasive catheterization

posted by Michael M. Lell, M.D. | Dec 3, 2014
Michael M. Lell, M.D.

Raw data-based IR significantly improves image quality in very low-dose prospectively ECG-triggered coronary dual-source CTA when compared with standard reconstruction using FBP. Read more

Case: Cardiopulmonary Abnormalities in a 6-month-old girl on an Extracorporeal Membrane Oxygenation

posted by Ronald Booij | Dec 2, 2014
Ronald Booij
  • Figure 1: Images showing the topogram, prospective ECG (scan 1), and flash mode (scan 2)

This article will focus on Cardiopulmonary Abnormalities in a 6-month-old girl on an Extracorporeal Membrane Oxygenation (ECMO) Machine. Read more

Body Perfusions Workshop Coming up on January 22-23, 2015

posted by DSCT.com editors | Dec 2, 2014

Jan 22, 2015 to Jan 23, 2015. Radiologists and Radiographers interested in Body Perfusion scanning will learn about the latest developments in a two-day workshop. Read more

Multicenter Evaluation Of Coronary Dual-Source CT angiography in patients with intermediate Risk of Coronary Artery Stenoses (MEDIC): study design and rationale

posted by Stephan Achenbach, M.D. | Nov 28, 2014
Stephan Achenbach, M.D.

The MEDIC trial trial determines the accuracy of DSCT to identify persons with at least 1 coronary artery stenosis among patients with low-to-intermediate pretest likelihood of disease. Read more

Dual-Energy CT in the follow-up after endovascular abdominal aortic aneurysm repair

posted by Harald Seifarth, M.D. | Nov 24, 2014
Harald Seifarth, M.D.

A scan protocol consisting of virtual non-enhanced images as well as 80 kV images taken during the venous phase was found to be a reliable alternative method for diagnosing endoleaks, while reducing the radiation exposure by 62.45 %. Read more

Feasibility of slice width reduction for spiral cranial CT using iterative image reconstruction

posted by Thomas Henzler, MD | Nov 19, 2014
Thomas Henzler, MD

To prospectively compare image quality of (CCT) examinations with varying slice widths using traditional FBP versus SAFIRE. Read more

Video: Creating the Aortic Annulus Plane in CT

posted by Stephan Achenbach, M.D. | Nov 14, 2014

This is a short video to demonstrate how the imaging plane in CT can be exactly aligned with the aortic annulus. Read more

TAVI Workshop coming up on March, 10, 2015

posted by DSCT.com editors | Nov 10, 2014

Mar 10, 2015; Participants learn about state-of-the-art techniques to enhance their practical skills for clinical routine in “Optimized TAVI Procedural Planning: CT and Angiography.” Read more

Dual-Energy CT: Oncologic Applications

posted by Carlo Nicola De Cecco, M.D., PhD | Nov 7, 2014
Carlo Nicola De Cecco, M.D., PhD

DECT is an innovative imaging technique that can dramatically affect the care of oncologic patients. Read more

Second-generation dual-energy CT of the abdomen: radiation dose comparison with 64- and 128-row single-energy acquisition

posted by Carlo Nicola De Cecco, M.D., PhD | Nov 3, 2014
Carlo Nicola De Cecco, M.D., PhD

The slightly increased radiation dose can be justified if the additional information obtained using a spectral imaging approach directly impacts on patient management or reduce the overall radiation dose with the generation of virtual unenhanced images, which can replace the precontrast acquisition. Read more

Potential for Radiation Dose Savings in Abdominal and Chest CT Using Automatic Tube Voltage Selection in Combination With Automatic Tube Current Modulation

posted by Thomas Henzler, MD | Oct 30, 2014
Thomas Henzler, MD

To evaluate the simultaneous use of automatic tube current modulation (ATCM) and automatic tube voltage selection (ATVS) for abdominal and chest CT. Read more

Virtual unenhanced images of the abdomen with second-generation dual-source dual-energy CT: image quality and liver lesion detection

posted by Carlo Nicola De Cecco, M.D., PhD | Oct 27, 2014
Carlo Nicola De Cecco, M.D., PhD

Second-generation abdominal VU data sets, despite a mostly excellent image quality, still cannot replace CU images in clinical practice because of limitations in material subtraction. Read more

Ask the expert – Flash in compromised renal function?

posted by DSCT.com editors | Oct 23, 2014
DSCT.com editors

In a patient with compromised renal function would flash imaging be possible? Flash scan at 30% with 50mL of contrast. (This would be for a TAVR study in a patient with poor renal function. Read more

Incremental value of pharmacological stress cardiac dual-energy CT over coronary CT angiography alone for the assessment of coronary artery disease in a high-risk population

posted by Carlo Nicola De Cecco, M.D., PhD | Oct 20, 2014
Carlo Nicola De Cecco, M.D., PhD

The purpose of this article is to prospectively determine the value of stress dual-energy CT (DECT) myocardial perfusion imaging to coronary CT angiography (CTA) for the assessment of coronary artery disease (CAD) in a high-risk population. Read more

Comparison of the effect of iterative reconstruction versus filtered back projection on cardiac CT postprocessing

posted by Rozemarijn Vliegenthart, M.D., PhD | Oct 14, 2014
Rozemarijn Vliegenthart, M.D., PhD

To investigate the impact of iterative reconstruction in image space (IRIS) on image noise, image quality (IQ), and postprocessing at coronary CT angiography (cCTA) compared to traditional filtered back-projection (FBP). Read more

Global Quantification of Left Ventricular Myocardial Perfusion at Dynamic CT: Feasibility in a Multicenter Patient Population

posted by Fabian Bamberg M.D., M.P.H. | Oct 6, 2014
Fabian Bamberg M.D., M.P.H.

The purpose of this study was to determine the feasibility of global quantitative measurements of left ventricular myocardial perfusion derived from stress dynamic CT myocardial perfusion imaging. Read more

Clinician Update: Coronary Artery CT Scanning

posted by Fabian Bamberg M.D., M.P.H. | Sep 30, 2014
Fabian Bamberg M.D., M.P.H.

The characteristics of this test, enabling rapid, noninvasive exclusion of obstructive lesions along with the definition of the distribution, severity, and composition of the atherosclerotic burden, uniquely address current and emerging needs in CAD management. Read more

Differences in coronary artery disease by CT angiography between patients developing unstable angina pectoris vs. major adverse cardiac events

posted by Fabian Bamberg M.D., M.P.H. | Sep 24, 2014
Fabian Bamberg M.D., M.P.H.

CT angiography (CTA) has prognostic value in patients. But it is unknown whether differences in atherosclerosis by CTA predict the development of unstable angina pectoris (UAP) vs. major adverse cardiac events (MACE). Read more

Atresia of the bilateral pulmonary veins: a rare and dismal anomaly identified on cardiac CT

posted by Hyun Woo Goo, M.D. | Sep 19, 2014
Hyun Woo Goo, M.D.

Cardiac CT provides an accurate diagnosis of bilateral pulmonary vein atresia and leads to prompt treatment decision in these children. Read more

Virtual Monoenergetic Dual-Energy CT: Optimization of Kiloelectron Volt Settings in Head and Neck Cancer

posted by Julian L. Wichmann, M.D. | Sep 16, 2014
Julian L. Wichmann, M.D.

Compared with linearly blended images, virtual monoenergetic reconstructions of DECT data at 60 keV significantly improve lesion enhancement and CNR, subjective overall image quality, and tumor delineation of head and neck squamous cell carcinoma. Read more

Low tube voltage and low contrast material volume cerebral CT angiography

posted by U. Joseph Schoepf, M.D. | Sep 11, 2014
U. Joseph Schoepf, M.D.

To evaluate the image quality, radiation dose and diagnostic accuracy of low kVp and low contrast material volume cerebral CT angiography (CTA) in intracranial aneurysm detection. Read more

Accuracy of dual-energy CT for the measurement of iodine concentration using cardiac CT protocols: validation in a phantom model

posted by Rozemarijn Vliegenthart, M.D., PhD | Sep 5, 2014
Rozemarijn Vliegenthart, M.D., PhD

To assess the accuracy of dual-energy CT (DECT) for the quantification of iodine concentrations in a thoracic phantom across various cardiac DECT protocols and simulated patient sizes. Read more

Non-linear blending of dual-energy CT data improves depiction of late iodine enhancement in chronic myocardial infarction

posted by Julian L. Wichmann, M.D. | Sep 1, 2014
Julian L. Wichmann, M.D.

To compare non-linear and linear blending of cardiac dual-energy CT for optimal visualization of late iodine enhancement in patients with chronic myocardial infarction. Read more

Lung ischaemia-reperfusion injury in a canine model: dual-energy CT findings with pathophysiological correlation

posted by U. Joseph Schoepf, M.D. | Aug 26, 2014
U. Joseph Schoepf, M.D.

DECT pulmonary perfusion mapping can be used to evaluate lung ischaemia-reperfusion injury. Read more

Diagnostic Accuracy of Coronary CT Angiography: Comparison of Filtered Back Projection and Iterative Reconstruction With Different Strengths

posted by U. Joseph Schoepf, M.D. | Aug 22, 2014
U. Joseph Schoepf, M.D.

To investigate the diagnostic accuracy of coronary CT angiography using filtered back projection (FBP) and sinogram-affirmed iterative reconstruction (SAFIRE) of different strength factors with invasive coronary angiography as the reference standard. Read more

Improvements in Third Generation Dual-Source CT and Benefits for Thoracic and Cardiac CT in Adult and Pediatrics

posted by Ronald Booij | Aug 19, 2014
Ronald Booij

This article will highlight the differences between SOMATOM Definition Flash and SOMATOM Force. The benefits of the (turbo) flash mode and the improvements for instance in pediatric CTA will be discussed. Read more

The distribution of urate deposition within the extremities in gout: a review of 148 dual-energy CT cases

posted by Savvas Nicolaou, M.D. | Aug 18, 2014
Savvas Nicolaou, M.D.

In this observational study, we provide for the first time a detailed analysis of extremity urate distribution in gout, which both supports and augments to the current understanding based on clinical and microscopic findings. Read more

Dr. Carlo De Cecco joins DSCT.com

posted by DSCT.com editors | Aug 18, 2014

We have the pleasure to welcome Dr. Carlo De Cecco in our Dual Source CT community. He is Assistant Professor of Radiology at the Medical University of South Carolina, USA. Dr. De Cecco is an expert in cardiovascular imaging, … Read more

Xenon-enhanced dual-energy CT lung ventilation imaging: techniques and clinical applications

posted by U. Joseph Schoepf, M.D. | Aug 14, 2014
U. Joseph Schoepf, M.D.

The purpose of this article is to review the techniques, clinically relevant potential applications, and limitations of xenon-enhanced dual-energy CT of the chest. Read more

Webinars on “Personalized CT imaging with SOMATOM Force” (4/4)

posted by Thomas Henzler, MD | Aug 8, 2014

In the fourth and final part of our webinar series on “Personalized CT imaging with SOMATOM Force,” Dr. Henzler talks about sedation-free and no-breathhold CT. This topic is especially important considering the rising numbers of CT scans for pediatric and geriatric patients. Read more

Coronary stent imaging with dual-source CT: assessment of lumen visibility using different convolution kernels and postprocessing filters

posted by Harald Seifarth, M.D. | Aug 5, 2014
Harald Seifarth, M.D.

The postprocessing filter reduces image noise, however currently it does not offer an alternative to image reconstruction using the edge-enhancing kernels for the evaluation of the stent lumen. Read more

Webinars on “Personalized CT imaging with SOMATOM Force” (3/4)

posted by Thomas Henzler, MD | Aug 4, 2014

In the third part of his webinar series on “Personalized CT imaging with SOMATOM Force,” Dr. Henzler discusses one of his favorite topics: functional imaging and therapy planning. Learn how this can be integrated into the workflow for patients. Read more

High-pitch coronary CT angiography with third generation dual-source CT: limits of heart rate

posted by Hatem Alkadhi, M.D., M.P.H., E.B.C.R. | Jul 28, 2014
Hatem Alkadhi, M.D., M.P.H., E.B.C.R.

Third-generation dual-source 192-slice CT allows for coronary angiography in the prospectively ECG-gated high-pitch mode with diagnostic image quality at HR up to 70 bpm. HRV is not significantly related to image quality of coronary CTA. Read more

Webinars on “Personalized CT imaging with SOMATOM Force” (2/4)

posted by Thomas Henzler, MD | Jul 25, 2014

Dr. Henzler welcomes you back to the second webinar on “Personalized CT imaging with SOMATOM Force.” In this episode, he discusses low radiation dose imaging – still one of the main topics in computed tomography. Read more

Performance of turbo high-pitch dual-source CT for coronary CT angiography: first ex vivo and patient experience

posted by Hatem Alkadhi, M.D., M.P.H., E.B.C.R. | Jul 23, 2014
Hatem Alkadhi, M.D., M.P.H., E.B.C.R.

To evaluate image quality, maximal heart rate allowing for diagnostic imaging, and radiation dose of turbo high-pitch dual-source CCTA. Read more

New series: Webinars on “Personalized CT imaging with SOMATOM Force” (1/4)

posted by Thomas Henzler, MD | Jul 21, 2014

This is the first part of our four-part series of webinars on “Personalized CT imaging with SOMATOM Force.” Dr. Thomas Henzler of the University Medical Center of Mannheim, Germany, shares his experiences with the 3rd generation dual source system. In part one, he discusses low contrast dose imaging. Read more

Closing in on the K Edge: Coronary CT Angiography at 100, 80, and 70 kV-Initial Comparison of a Second- versus a Third-Generation Dual-Source CT System

posted by Thomas Henzler, MD | Jul 17, 2014
Thomas Henzler, MD

To prospectively evaluate radiation and contrast medium requirements for performing high-pitch coronary CT angiography at 70 kV using a third-generation DSCT system in comparison to a second-generation DSCT system. Read more

Image quality and radiation dose of low tube voltage 3(rd) generation dual-source coronary CT angiography in obese patients: a phantom study

posted by U. Joseph Schoepf, M.D. | Jul 11, 2014
U. Joseph Schoepf, M.D.

Third-generation DSCT enables one to perform coronary CTA at 70-80 kV in obese patients without compromising CNR and thus reduces radiation dose by 49-68 %. Read more

Feasibility of prospectively ECG-triggered high-pitch coronary CT angiography with 30 mL iodinated contrast agent at 70 kVp: initial experience

posted by U. Joseph Schoepf, M.D. | Jul 7, 2014
U. Joseph Schoepf, M.D.

To evaluate the feasibility, image quality and radiation dose of prospectively ECG-triggered high-pitch coronary CT angiography (CCTA) with 30 mL contrast agent at 70 kVp. Read more

Ultralow-Dose Chest CT for Pulmonary Nodule Detection: First Performance Evaluation of Single Energy Scanning With Spectral Shaping

posted by Sebastian Leschka, M.D. | Jul 1, 2014
Sebastian Leschka, M.D.

The purpose of this study was to evaluate the image quality and sensitivity of ultralow radiation dose single-energy CT with tin filtration for spectral shaping and iterative reconstructions for the detection of pulmonary nodules in a phantom setting. Read more

Peering through the glare: using dual-energy CT to overcome the problem of metal artefacts in bone radiology

posted by Savvas Nicolaou, M.D. | Jun 27, 2014
Savvas Nicolaou, M.D.

This article reviews the theory of dual-energy CT (DECT) and its ability to reduce metal artefact, thus enhancing the diagnostic value of musculoskeletal imaging. Read more

Dr. Rozemarijn Vliegenthart joins DSCT.com

posted by DSCT.com editors | Jun 26, 2014

We have the pleasure to welcome Dr. Rozemarijn Vliegenthart in our Dual Source CT community. She is Radiologist and Head of Research Committee Radiology as well as Discipline Leader X-ray/CT at the University Medical Center of Groningen, The Netherlands. Dr. Vliegenthart is … Read more

Free webinar about low-kV imaging

posted by DSCT.com editors | Jun 25, 2014

Jul 15, 2014; Jul 17, 2014; Learn about advances in low-kV imaging and enhance your practical skills for clinical routine. Read more

Feasibility of single-source dual-energy CT for urinary stone characterization and value of iterative reconstructions

posted by Hatem Alkadhi, M.D., M.P.H., E.B.C.R. | Jun 24, 2014
Hatem Alkadhi, M.D., M.P.H., E.B.C.R.

The purposes of this study were to demonstrate the feasibility and accuracy of single-source dual-energy (DE) CT with sequential data acquisition and a coregistration motion correction algorithm for urinary stone characterization and to evaluate the value of iterative reconstructions in DE imaging. Read more

Evaluation of monoenergetic late iodine enhancement dual-energy CT for imaging of chronic myocardial infarction

posted by Josef Matthias Kerl, M.D. | Jun 20, 2014
Josef Matthias Kerl, M.D.

To evaluate image quality and diagnostic accuracy of selective monoenergetic reconstructions of late iodine enhancement (LIE) dual-energy CT (DECT) for imaging of chronic myocardial infarction (CMI). Read more

Whole-body CT for lymphoma staging: feasibility of halving radiation dose and risk by iterative image reconstruction

posted by Thomas Henzler, MD | Jun 17, 2014
Thomas Henzler, MD

We aimed to investigate the objective and subjective image quality as well as radiation exposure and risk of full-dose standard (FDS), full-dose iterative (FDI), and half-dose iterative (HDI) image reconstruction in patients with lymphoma. Read more

Dual-Energy CT Tendon Algorithm in Acute Trauma: Initial Experiences

posted by Savvas Nicolaou, M.D. | Jun 13, 2014
Savvas Nicolaou, M.D.

CT has become increasingly popular in the assessment of limbs in the acute trauma setting. We report our initial experiences of 4 cases with imaging and clinical correlation. Read more

Added Value of Dual-Energy CT Versus Single-Energy CT in Assessing Ferromagnetic Properties of Ballistic Projectiles: Implications for MRI of Gunshot Victims

posted by Hatem Alkadhi, M.D., M.P.H., E.B.C.R. | Jun 10, 2014
Hatem Alkadhi, M.D., M.P.H., E.B.C.R.

We sought to determine whether a “safe zone” for TSP could be visualised by CT, especially if larger device sizes for interatrial septal communication closure (IASC-C) had been used. Read more

Objective and Subjective Image Quality of Liver Parenchyma and Hepatic Metastases with Virtual Monoenergetic Dual-source Dual-energy CT Reconstructions: An Analysis in Patients with Gastrointestinal Stromal Tumor

posted by Thomas Henzler, MD | Jun 6, 2014
Thomas Henzler, MD

To compare in dual-energy CT conventionally reconstructed polyenergetic images (PEI) at 120 kVp to virtual monoenergetic images at different keV levels for evaluation of liver and gastrointestinal stromal tumor (GIST) hepatic metastases with regard to objective and subjective image quality. Read more

Dose Reduction in CT of the Chest: Image Quality of Iterative Reconstructions at a 50% Radiation Dose Compared to Filtered Back Projection at a 100% Radiation Dose

posted by Michael M. Lell, M.D. | Jun 4, 2014
Michael M. Lell, M.D.

The aim of this study was to evaluate the potential of iterative reconstruction (IR) in chest CT to reduce radiation exposure. Read more

Comparison of dual-energy CT-derived iodine content and iodine overlay of normal, inflammatory and metastatic squamous cell carcinoma cervical lymph nodes

posted by Josef Matthias Kerl, M.D. | May 30, 2014
Josef Matthias Kerl, M.D.

DECT-derived iodine content and overlay differ significantly among normal, inflammatory and metastatic SCC cervical lymph nodes. Read more

Value of monoenergetic low-kV dual energy CT datasets for improved image quality of CT pulmonary angiography

posted by Thomas Henzler, MD | May 26, 2014
Thomas Henzler, MD

This study evaluated the impact of calculated monoenergetic dual-energy CTPA datasets on vessel attenuation and CNR. Read more

50% Dose CT in acute cervical spine injury: Improved Signal and Reduced Artifact at the Cervicothoracic Junction using Fully Integrated Circuit CT detectors

posted by Savvas Nicolaou, M.D. | May 21, 2014
Savvas Nicolaou, M.D.

In this study we compare subjective and objective image quality between 100% dose and 50% dose dual source cervical spine CT datasets obtained using both traditional discrete (DC) and novel fully integrated (IC) detectors. Read more

First-Arterial-Pass Dual-Energy CT for Assessment of Myocardial Blood Supply: Do We Need Rest, Stress, and Delayed Acquisition? Comparison with SPECT

posted by Thomas Henzler, MD | May 16, 2014
Thomas Henzler, MD

To compare the relative contributions of rest, stress, and delayed acquisitions with the accuracy of dual-energy CT for the assessment of myocardial blood supply. Read more

CT metal artefact reduction for internal fixation of the proximal humerus: Value of mono-energetic extrapolation from dual-energy and iterative reconstructions

posted by Hatem Alkadhi, M.D., M.P.H., E.B.C.R. | May 12, 2014
Hatem Alkadhi, M.D., M.P.H., E.B.C.R.

Both IFS-MAR in SECT and mono-energetic DECT produce improved image quality and a reduction of metal artefacts. Screw tip positions can be most confidently assessed using DECT. Read more

Imaging Acute Left Lower Quadrant Pain

posted by Savvas Nicolaou, M.D. | May 6, 2014
Savvas Nicolaou, M.D.

1. Review the variety of pathophysiology causing patients to present with acute left lower quadrant (LLQ) pain 2. Discuss the imaging modalities and imaging characteristics used in diagnosis of LLQ pain Read more

Optimization of Kiloelectron Volt Settings in Cerebral and Cervical Dual-energy CT Angiography Determined with Virtual Monoenergetic Imaging

posted by Thomas Henzler, MD | May 2, 2014
Thomas Henzler, MD

The aim of this study was to evaluate objective image quality indices of calculated low-kiloelectron volt monoenergetic DECT angiographic cervical and cerebral data sets compared to virtual 120-kV polyenergetic images. Read more

Clinical Utility of Fully Integrated Chip CT detector in Suspected Pulmonary Embolism Imaging

posted by Savvas Nicolaou, M.D. | Apr 29, 2014
Savvas Nicolaou, M.D.

We compare both quantitative and qualitative image quality, between the traditional DC detector and a novel IC detector in diagnosis of pulmonary embolism in the acute setting. Read more

Updates and New concepts on Multi-detector CT (MDCT) imaging of Blunt Hepato-Biliary and Splenic Trauma

posted by Savvas Nicolaou, M.D. | Apr 23, 2014
Savvas Nicolaou, M.D.

Major teaching points were • imaging findings and spectrum of injury on MDCT, and implications on conservative vs operative management • new dose reduction strategies using MDCT • Role of follow up imaging and provide an imaging algorithm initial assessment and follow up Read more

TAVI Workshop coming up on May 27, 2014

posted by DSCT.com editors | Apr 16, 2014

May 27, 2014; 08:30 to 16:00. Participants learn about state-of-the-art techniques to enhance their practical skills for clinical routine in “Optimized TAVI Procedural Planning: CT and Angiography.” Read more

Dual-Energy CT-based Phantomless in Vivo Three-dimensional Bone Mineral Density Assessment of the Lumbar Spine

posted by Julian L. Wichmann, M.D. | Apr 15, 2014
Julian L. Wichmann, M.D.

Dedicated postprocessing of dual-energy CT data allows for phantomless in vivo BMD assessment of the trabecular bone of lumbar vertebrae and enables freely rotatable color-coded 3D visualization of intravertebral BMD distribution. Read more

Presentation: Detection of occult hip fractures utilizing a dual energy CT algorithm targeted to detection of bone marrow edema: early clinical experience

posted by Savvas Nicolaou, M.D. | Apr 9, 2014
Savvas Nicolaou, M.D.

DECT with virtual non-calcium subtraction imaging is highly sensitive in the detection of bone marrow edema in radiographically occult hip fractures. In our limited series it was a very useful adjunct to confirm equivocal CT findings of subtle cortical irregularities. Read more

Carotid CTA: Radiation Exposure and Image Quality with the Use of Attenuation-Based, Automated Kilovolt Selection

posted by Michael M. Lell, M.D. | Apr 2, 2014
Michael M. Lell, M.D.

The attenuation-based, kilovolt selection algorithm enables a dose reduction of >30% in carotid artery CTA while maintaining contrast-to-noise ratio and subjective image quality at adequate levels. Read more

Iterative reconstructions versus filtered back-projection for urinary stone detection in low-dose CT

posted by Hatem Alkadhi, M.D., M.P.H., E.B.C.R. | Mar 28, 2014
Hatem Alkadhi, M.D., M.P.H., E.B.C.R.

IR improves image quality and confidence for diagnosing urinary stone disease in abdominal low-dose CT. Read more

Frequency split metal artefact reduction in pelvic CT

posted by Michael M. Lell, M.D. | Mar 25, 2014
Michael M. Lell, M.D.

NMAR, FSLIMAR and FSNMAR have the potential to improve image quality in patients with artefacts from metal hardware and to improve the diagnostic accuracy of CT of the organs of the pelvis. Read more

Effect of high-pitch dual-source CT to compensate motion artifacts: a phantom study

posted by Hatem Alkadhi, M.D., M.P.H., E.B.C.R. | Mar 19, 2014
Hatem Alkadhi, M.D., M.P.H., E.B.C.R.

High-pitch DSCT significantly decreases motion artifacts in various directions and improves image quality. Read more

Diagnostic accuracy of late iodine-enhancement dual-energy CT for the detection of chronic myocardial infarction compared with late gadolinium-enhancement 3-T MRI

posted by Julian L. Wichmann, M.D. | Mar 12, 2014
Julian L. Wichmann, M.D.

Late iodine enhancement cardiac dual-energy CT correlates well with LGE-MRI for detecting CMI and benefits from linear blending, whereas iodine distribution analysis provides inferior accuracy. Read more

Dr. Thomas Henzler joins DSCT.com

posted by dsct.com | Mar 4, 2014

We have the pleasure to welcome Dr. Thomas Henzler in our Dual Source CT community. Read more

Coronary artery stent imaging with CT using an integrated electronics detector and iterative reconstructions: first in vitro experience

posted by Hatem Alkadhi, M.D., M.P.H., E.B.C.R. | Mar 3, 2014
Hatem Alkadhi, M.D., M.P.H., E.B.C.R.

CT coronary stent imaging is significantly improved by using a detector with integrated electronics combined with iterative reconstructions. Read more

Abdominal dual-source dual-energy CT: Uses in clinical practice

posted by Marilyn J. Siegel, M.D. | Feb 28, 2014
Marilyn J. Siegel, M.D.

In this review article, the authors evaluate techniques, including the use of a single contrast-enhanced acquisition to yield unenhanced and contrast-enhanced CT data. Read more

Julian Wichmann joins DSCT.com

posted by DSCT.com editors | Feb 25, 2014

We have the pleasure to welcome Julian Wichmann in our Dual Source CT community. Read more

Attenuation-based automatic kilovolt (kV)-selection in CT of the chest: effects on radiation exposure and image quality

posted by Michael M. Lell, M.D. | Feb 24, 2014
Michael M. Lell, M.D.

The attenuation based kV-selection algorithm enables relevant dose reduction (~27%) in chest-CT while keeping image quality parameters at high levels. Read more

Stent evaluation in low-dose coronary CT angiography: Effect of different iterative reconstruction settings

posted by Michael M. Lell, M.D. | Feb 19, 2014
Michael M. Lell, M.D.

Aim of this study was to test whether different IR settings have a clinically relevant influence on image quality and on the diagnostic accuracy of low-dose CT angiography in patients with a stent. Read more

Combining automated attenuation-based tube voltage selection and iterative reconstruction: a liver phantom study

posted by Hatem Alkadhi, M.D., M.P.H., E.B.C.R. | Feb 15, 2014
Hatem Alkadhi, M.D., M.P.H., E.B.C.R.

To determine the value of combined automated attenuation-based tube-potential selection and iterative reconstructions (IRs) for optimising computed tomography (CT) imaging of hypodense liver lesions. Read more

Effects of Automated Kilovoltage Selection Technology on Contrast-enhanced Pediatric CT and CT Angiography

posted by Marilyn J. Siegel, M.D. | Feb 12, 2014
Marilyn J. Siegel, M.D.

In pediatric CT and CT angiography, the use of automated kilovoltage selection technology significantly reduces radiation dose while maintaining image quality and CNR. Read more

A method to determine suitable fluoroscopic projections for transcatheter aortic valve implantation by CT

posted by Michael M. Lell, M.D. | Feb 7, 2014
Michael M. Lell, M.D.

We developed and validated a simple method to predict suitable fluoroscopic projections on the basis of cardiac CT datasets. Read more

Patient-specific predictors of image noise in coronary CT angiography

posted by Michael M. Lell, M.D. | Feb 4, 2014
Michael M. Lell, M.D.

We aimed to find a patient-specific predictor of image noise to determine the use of reduced tube voltage. Read more

Sizing the mitral annulus in healthy subjects and patients with mitral regurgitation: 2D versus 3D measurements from cardiac CT

posted by Hatem Alkadhi, M.D., M.P.H., E.B.C.R. | Jan 30, 2014
Hatem Alkadhi, M.D., M.P.H., E.B.C.R.

Our study provides in vivo human CT data on MA dimensions in normals and patients with FMR, indicating differences in patients for the area, posterior circumference and SLD but not for the anterior circumference and CC. Read more

Automated low-kilovoltage selection in pediatric CT angiography: phantom study evaluating effects on radiation dose and image quality

posted by Marilyn J. Siegel, M.D. | Jan 27, 2014
Marilyn J. Siegel, M.D.

The purpose of this study was to compare the effects of combined automated tube voltage selection and automated tube current modulation on radiation dose and image quality in small-sized phantoms undergoing CTA with the use of automated current modulation alone. Read more

Low-dose dual-source CT angiography with iterative reconstruction for coronary artery stent evaluation

posted by Michael M. Lell, M.D. | Jan 24, 2014
Michael M. Lell, M.D.

The purpose of this study was to evaluate the image quality and diagnostic accuracy of very low-dose DSCT angiography for the evaluation of coronary stents. Read more

Dual-energy CT: general principles

posted by Thorsten R. C. Johnson, M.D. | Jan 20, 2014
Thorsten R. C. Johnson, M.D.

DECT offers the possibility to exploit spectral information for diagnostic purposes. There are different technical approaches, all of which have inherent advantages and disadvantages, especially regarding spectral contrast and dose efficiency. Read more

Dual-energy CT applications in head and neck imaging

posted by Ralf Bauer, M.D. | Jan 15, 2014
Ralf Bauer, M.D.

As with other body regions, both image fusion and material characterization dual-energy applications can be used for head and neck imaging. Read more

Acute myocardial infarct detection with dual energy CT: correlation with single photon emission CT myocardial scintigraphy in a canine model

posted by U. Joseph Schoepf, M.D. | Jan 10, 2014
U. Joseph Schoepf, M.D.

Dual-energy CT (DECT) has been used to detect myocardial infarct. However, few comparable studies with histopathological findings as gold standard have been published. Read more

Influence of observer experience and training on proficiency in coronary CT angiography interpretation

posted by U. Joseph Schoepf, M.D. | Jan 2, 2014
U. Joseph Schoepf, M.D.

The level of experience appears to be a strong determinant of proficiency in CCTA interpretation. Limited one-time training improves proficiency in novice readers, but not to clinically satisfactory levels. Read more

Dual-energy CT imaging of thoracic malignancies

posted by U. Joseph Schoepf, M.D. | Dec 27, 2013
U. Joseph Schoepf, M.D.

Computed tomography (CT) plays a pivotal role in the detection, characterization, and staging of lung cancer and other thoracic malignancies. Since the introduction of clinically viable dual-energy CT techniques, substantial evidence has accumulated on the use of this modality for imaging chest malignancies. This article describes the principles of dual-energy … Read more

Cases: Bioresorbable Vascular Scaffolds in Dual Source CT Coronary Angiography

posted by Stephan Achenbach, M.D. | Dec 23, 2013
Stephan Achenbach, M.D.
  • High grade stenosis of the left anterior descending coronary artery.
  • End and beginning of the scaffold.
  • Several high grade stenoses of the right coronary artery.
  • Scaffolds in the right coronary ostium and in the mid right coronary artery.

We present two cases to illustrate the CT appearance of bioresorbable vascular scaffolds placed in the coronary arteries. Read more

Metal artefact reduction from dental hardware in carotid CT angiography using iterative reconstructions

posted by Hatem Alkadhi, M.D., M.P.H., E.B.C.R. | Dec 18, 2013
Hatem Alkadhi, M.D., M.P.H., E.B.C.R.

To determine the value of a metal artefact reduction (MAR) algorithm with iterative reconstructions for dental hardware in carotid CT angiography. Read more

Iterative image reconstruction: a realistic dose-saving method in cardiac CT imaging?

posted by U. Joseph Schoepf, M.D. | Dec 11, 2013
U. Joseph Schoepf, M.D.

For cardiac computed tomography, iterative reconstruction represents a promising and readily available tool. Read more

Influence of vascular enhancement, age and gender on pulmonary perfused blood volume quantified by dual-energy-CTPA

posted by Thorsten R. C. Johnson, M.D. | Dec 4, 2013
Thorsten R. C. Johnson, M.D.

DE-CTPA derived PBV values need to be corrected for age, vascular enhancement and timing but not for gender. The age-specific ranges of normal derived from this study can be used as a reference in future studies of PBV in pulmonary pathologies. Read more

News: Winner of the Siemens Right Dose Image Contest 2013

posted by DSCT.com editors | Dec 4, 2013

The winners of the “Right Dose Excellence Award” have been announced on December, 1st. 2013. From 326 submissions, the expert jury and the users of the Image Contest website decided who should win. Read more

Dynamic CT myocardial perfusion imaging: performance of 3D semi-automated evaluation software

posted by Fabian Bamberg M.D., M.P.H. | Nov 30, 2013
Fabian Bamberg M.D., M.P.H.

To evaluate the performance of three-dimensional semi-automated evaluation software for the assessment of myocardial blood flow (MBF) and blood volume (MBV) at dynamic myocardial perfusion computed tomography (CT). Read more

When to use what!? The ‘Flash’ mode

posted by Ronald Booij | Nov 27, 2013
Ronald Booij

When should you choose the high pitch mode? What are the benefits and downsides? How will this affect your protocol set-up? Get tips and tricks in this article. Read more

Reduction of Metal Artifacts from Hip Prostheses on CT Images of the Pelvis: Value of Iterative Reconstructions

posted by Hatem Alkadhi, M.D., M.P.H., E.B.C.R. | Nov 26, 2013
Hatem Alkadhi, M.D., M.P.H., E.B.C.R.

The IFS algorithm for CT image reconstruction significantly reduces metal artifacts from hip prostheses, improves the reliability of CT number measurements, and improves the confidence for depicting pelvic abnormalities. Read more

CT Perfusion Imaging for the Prediction of Response and Survival to Transarterial Radioembolization of Liver Metastases

posted by Hatem Alkadhi, M.D., M.P.H., E.B.C.R. | Nov 22, 2013
Hatem Alkadhi, M.D., M.P.H., E.B.C.R.

The purpose of this study was to evaluate prospectively, in patients with liver metastases, the ability of CT perfusion to predict the morphologic response and survival after transarterial radioembolization (TARE). Read more

Automated Quantification of Pulmonary Perfused Blood Volume by Dual-Energy-CTPA in Chronic Thromboembolic Pulmonary Hypertension

posted by Thorsten R. C. Johnson, M.D. | Nov 18, 2013
Thorsten R. C. Johnson, M.D.

DE-CTPA can be used for an immediate, reader-independent estimation of global pulmonary PBV in chronic thromboembolic pulmonary hypertension, which inversely correlates with systolic and mean pulmonary arterial pressure. Read more

Quantitative analysis of motion artifacts in high-pitch dual-source CT of the thorax

posted by Josef Matthias Kerl, M.D. | Nov 15, 2013
Josef Matthias Kerl, M.D.

A high-pitch, dual-source mode is potentially advantageous for evaluating the lung parenchyma and vascular structures in patients who have difficulty complying with breath-holding instructions. Read more

Case: DE lung 2 year old child

posted by Ronald Booij | Nov 11, 2013
Ronald Booij
  • Protocol_DE lung 2 year old child
  • Fig. 1 DE lung 2 year old child
  • Fig. 2 DE lung 2 year old child
  • Fig. 3 DE lung 2 year old child

This exam will save the young child a lot of time and more intensive exams, like for instance invasive angiography or scintigraphy. Read more

Case: ALCAPA 3 month old boy

posted by Ronald Booij | Nov 11, 2013
Ronald Booij
  • ALCAPA 3 month old boy
  • Fig. 1 ALCAPA 3 month old boy
  • Fig. 2 ALCAPA 3 month old boy
  • Fig. 3 ALCAPA 3 month old boy

SAFIRE already lowered the dose with 30%, the use of CARE kV allowed further dose reduction while image quality is sustained. Read more

Case: Aortic coarctation in 7 month old child

posted by Ronald Booij | Nov 7, 2013
Ronald Booij
  • Cases_Booij_Aoritc coarctation 7mo child
  • Fig. 1
  • Fig. 2
  • Fig. 3

With the help of SAFIRE, dose optimization slider 11 (only angio) and a very strong dose curve we received an optimal image quality with the lowest possible dose. Read more

Case: Flash soronary CTA in 43 year old female

posted by Ronald Booij | Nov 6, 2013
Ronald Booij
  • Cases_Booij_Flash CCTA 43Y female
  • Fig. 1
  • Fig. 2
  • Fig. 3

Because of a stable and very low heart rate (average 44 BPM), we chose to perform a high pitch CTA of the coronaries, which will give you good image quality, without stack artifacts like in prospective mode . Read more

Case: Dual energy CTA of a 4 months old child

posted by Ronald Booij | Nov 5, 2013
Ronald Booij
  • Protocol Dual Energy CTA
  • DSCT Dual Energy CTA
  • DSCT Dual Energy CTA
  • DSCT Dual Energy CTA

CTA in children is often performed with 70-80kV. This will give the lowest possible dose. In this case we choose to perform a DE scan (80/Sn140KV) which will result in a higher dose. Read more

Case: CTA thorax 4 months old child

posted by Ronald Booij | Nov 3, 2013
Ronald Booij
  • Cases_Booij_CTA_Thorax_4_months_old_child_table
  • Fig. 1
  • Fig. 2
  • Fig. 3

Baby of 4 months was sent in for a CTA of the thorax. Because of the free breathing of the child, we chose to do a high pitch (Flash) CT of the thorax with intravenous contrast. Read more

Case: Dilatation Pulmonary trunk

posted by Ronald Booij | Nov 1, 2013
Ronald Booij
  • Cases_Booij_Dilatation_Pulmonary_trunk_table
  • Fig. 1
  • Fig. 2
  • Fig. 3

Patient presents with severe common pulmonary artery dilatation. We injected a larger bolus then normal for CCTA, because of the big volume of the Pulmonary trunk and we wanted to enhance all vessels in the thorax. Read more

Case: Tumor of the left kidney

posted by Ronald Booij | Oct 30, 2013
Ronald Booij
  • Cases_Booij_Tumor_of_the_left_kidney_table
  • Fig. 1
  • Fig. 2
  • Fig. 3

Patient presented with pain in the back and occasionally dark urine. Heterogeneous mass in the left kidney, suspected for oncocytoma or a renal cell carcinoma. Read more

Case: BT Shunt

posted by Marilyn J. Siegel, M.D. | Oct 28, 2013
Marilyn J. Siegel, M.D.
  • Cases_Siegel_BT_Shunt_Table
  • Fig. 1
  • Fig. 2
  • Fig. 3

6 month old girl Patient has had a palliative shunt placed between the brachiocephalic artery and pulmonary artery. CT performed to evaluate for possible stenoses. Read more

Case: Palpable Abdominal Mass

posted by Marilyn J. Siegel, M.D. | Oct 26, 2013
Marilyn J. Siegel, M.D.
  • Cases_Siegel_Palpable_Abdominal_Mass_Table
  • Fig. 1
  • Fig. 2
  • Fig. 3

1-year-old boy with a palpable abdominal mass. Read more

Case: Double Arch

posted by Marilyn J. Siegel, M.D. | Oct 25, 2013
Marilyn J. Siegel, M.D.
  • Cases_Siegel_Double_Arch_Table2
  • Fig. 1
  • Fig. 2
  • Fig. 3

16 month old girl with wheezing. Evaluate for possible vascular ring. Read more

Case: PA Stent

posted by Marilyn J. Siegel, M.D. | Oct 22, 2013
Marilyn J. Siegel, M.D.

Patient has had a definitive repair with replacement of a stented conduit between the right ventricle and pulmonary artery. CT requested to evaluate for patency of the stent. Read more

News: Public Voting Started for the Siemens Right Dose Image Contest 2013

posted by DSCT.com editors | Oct 21, 2013

The voting for “The Public’s Favorite CT Image 2013” has now started. Go to the image gallery right now and choose your favorite images. Read more

Quantification of coronary artery stenosis with high-resolution CT in comparison with histopathology in an ex vivo study

posted by Sebastian Leschka, M.D. | Oct 17, 2013
Sebastian Leschka, M.D.

High-resolution CT reliably depicts advanced stage coronary plaques with an overall good correlation of stenosis degree compared to histology, however, the degree of stenosis is systematically overestimated in calcified and underestimated in non-calcified plaques. Read more

Bolus timing in high-pitch CT angiography of the aorta

posted by Josef Matthias Kerl, M.D. | Oct 10, 2013
Josef Matthias Kerl, M.D.

In high-pitch CT angiography using a start delay of 10s after a trigger threshold of 140 HU in the descending aorta is reached, a homogenous contrast along the z-axis is accomplished. Read more

Monoenergetic CT reconstructions reduce beam hardening artifacts from dental restorations

posted by Hatem Alkadhi, M.D., M.P.H., E.B.C.R. | Oct 2, 2013
Hatem Alkadhi, M.D., M.P.H., E.B.C.R.

The aim of this study was to assess the potential of monoenergetic CT images to reduce beam hardening artifacts in comparison to standard CT images of dental restoration on dental post-mortem CT. Read more

Computed tomography for planning transcatheter aortic valve replacement

posted by U. Joseph Schoepf, M.D. | Sep 27, 2013
U. Joseph Schoepf, M.D.

This article describes the rapidly emerging role of CT in the context of pre-TAVR assessment. Read more

Iterative reconstructed ultra high pitch CT pulmonary angiography with cardiac bowtie-shaped filter in the acute setting: Effect on dose and image quality

posted by Savvas Nicolaou, M.D. | Sep 23, 2013
Savvas Nicolaou, M.D.

To evaluate the effect of a cardiac bowtie-shaped filter in an ultra high pitch CTPA protocol at 100kV on image quality and radiation dose. Read more

Robin Brothers joins DSCT.com

posted by DSCT.com editors | Sep 19, 2013

We have the pleasure to welcome Robin L. Brothers in our Dual Source CT community. She is supervisor and instructor of Cardiac Imaging in CT at the Medical University of South Carolina, USA. She is an expert in in cardiac … Read more

Split-bolus dual-energy CT urography: protocol optimization and diagnostic performance for the detection of urinary stones

posted by Hatem Alkadhi, M.D., M.P.H., E.B.C.R. | Sep 17, 2013
Hatem Alkadhi, M.D., M.P.H., E.B.C.R.

Split-bolus DECT urography was technically feasible and quality of virtual non-enhanced images (VNEI) was improved with the 100/140 kVp setting. Detection of urinary stones Read more

Practical use of the CARE kV mode

posted by Ronald Booij | Sep 12, 2013
Ronald Booij

CARE kV can be used in three different modes. Here we describe how the modes work and the ways in which you can adapt CARE kV to your preferences and for your benefit. Read more

Impact of Iodine Delivery Rate with Varying Flow Rates on Image Quality in Dual-Energy CT of Patients with Suspected Pulmonary Embolism

posted by U. Joseph Schoepf, M.D. | Sep 7, 2013
U. Joseph Schoepf, M.D.

Despite increased artifacts on iodine perfusion maps, highly concentrated iodinated contrast material combined with high flow rates provides improved diagnostic image quality and has the highest target-tract attenuation for DE-CTPA protocols. Read more

ARRS 2014, San Diego

posted by DSCT.com editors | Sep 5, 2013

May 4, 2014 to May 9, 2014. The 2014 Annual Meeting of the American Roentgen Ray Society (ARRS) addresses radiologists, radiologists in training, and other health professionals interested in the practice and science of radiology. Submission deadline is September 15, 2013! Read more

Dual-energy CT lung ventilation/perfusion imaging for diagnosing pulmonary embolism

posted by U. Joseph Schoepf, M.D. | Sep 3, 2013
U. Joseph Schoepf, M.D.

DECT lung ventilation/perfusion imaging is feasible and can visualise ventilation/perfusion match or mismatch in patients with suspected PE. Read more

Effect of automatic tube voltage selection on image quality and radiation dose in abdominal CT angiography of various body sizes: a phantom study

posted by Hatem Alkadhi, M.D., M.P.H., E.B.C.R. | Aug 30, 2013
Hatem Alkadhi, M.D., M.P.H., E.B.C.R.

To assess the effect of an automatic tube voltage selection technique on image quality and radiation dose in abdominal CT angiography of various body sizes. Read more

Time-resolved CT angiography in aortic dissection

posted by Fabian Bamberg M.D., M.P.H. | Aug 27, 2013
Fabian Bamberg M.D., M.P.H.

We performed this study to assess feasibility and additional diagnostic value of time-resolved CT angiography of the entire aorta in patients with aortic dissection. Read more

Dual energy CT in patients with polycystic kidney disease

posted by Anno Graser, M. D. | Aug 23, 2013
Anno Graser, M. D.

DECT greatly facilitates the detection of malignancy in patients with polycystic kidney disease, at the same time reducing radiation exposure by omission of a true unenhanced phase. Read more

Detection of coronary artery stenosis with sub-milliSievert radiation dose by prospectively ECG-triggered high-pitch spiral CT angiography and iterative reconstruction

posted by U. Joseph Schoepf, M.D. | Aug 20, 2013
U. Joseph Schoepf, M.D.

High-pitch prospectively ECG-triggered cCTA combined with iterative image reconstruction provides high diagnostic accuracy with a radiation dose below 1 mSv for detection of coronary artery stenosis. Read more

CARE kV principals

posted by Ronald Booij | Aug 12, 2013
Ronald Booij

What mAs do we need for each kV to maintain image quality for every type of scan? CARE kV allows us to adjust levels manually and/or automatically. Read more

Clinical utility of ultra high pitch dual source thoracic CT imaging of acute pulmonary embolism in the emergency department: Are we one step closer towards a non-gated triple rule out?

posted by Savvas Nicolaou, M.D. | Aug 7, 2013
Savvas Nicolaou, M.D.

Aim of this study was to retrospectively compare the image quality and the radiation dose of an ultra high pitch CT scan for the evaluation of PE and visualization of cardiac structures in comparison to our institution’s standard PE protocol. Read more

Quantification of coronary artery calcium on the basis of dual-energy coronary CT angiography

posted by Balazs Ruzsics, M.D., PhD | Jul 31, 2013
Balazs Ruzsics, M.D., PhD

To evaluate the feasibility of using virtual noncontrast material-enhanced (VNC) CT series derived from dual-energy CT imaging studies for coronary artery calcium quantification. Read more

Optimal timing for first-pass stress CT myocardial perfusion imaging

posted by Fabian Bamberg M.D., M.P.H. | Jul 23, 2013
Fabian Bamberg M.D., M.P.H.

The aim of this study was to provide guidance for optimal timing of single-phase first-pass stress CTP acquisitions. Read more

Case: CTA thorax of baby < 6 months with suspected congenital cystic adenomatoid malformation (CCAM)

posted by Ronald Booij | Jul 15, 2013
Ronald Booij
  • Fig. 1 Cystic lesion in the left lower lobe
  • Fig. 2 Cystic lesion in the left lower lobe

A baby of < 6 months, with a known antenatal congenital cystic adenomatoid malformation (CCAM) left measuring 2.5 cm in diameter, was sent for a CTA of the thorax. Read more

CT perfusion imaging of renal cell carcinoma: systematic comparison with histopathological angiogenic and prognostic markers

posted by Hatem Alkadhi, M.D., M.P.H., E.B.C.R. | Jul 9, 2013
Hatem Alkadhi, M.D., M.P.H., E.B.C.R.

The aim of this study was to systematically analyze the correlation between CT perfusion and histopathological angiogenic and prognostic markers in patients with renal cell carcinoma (RCC). Read more

Dose and image quality of high-pitch dual source CT for the evaluation of cervical lymph node status – Comparison to regular 128-slice single source CT

posted by Ralf Bauer, M.D. | Jul 1, 2013
Ralf Bauer, M.D.

A high-pitch dual-source CT (DSCT) was compared to a standard single-source CT protocol in terms of dose and image quality for malignant lymphoma staging. Read more

Uncommon Cause of Ventricular Tachycardia in a Patient with a Giant Pseudoaneurysm of the Ascending Aorta

posted by Hatem Alkadhi, M.D., M.P.H., E.B.C.R. | Jun 27, 2013
Hatem Alkadhi, M.D., M.P.H., E.B.C.R.

We present an uncommon cause of ventricular tachycardia due to excessive right coronary artery stretch in a patient with a giant pseudoaneurysm of the ascending aorta years after aortic root repair. Read more

Bolus timing in high-pitch CT angiography of the aorta

posted by Ralf Bauer, M.D. | Jun 14, 2013
Ralf Bauer, M.D.

To investigate the bolus geometry in high-pitch CT angiography (CTA) of the aorta without ECG synchronisation in comparison to single-source CT. Read more

News: The Right Dose Image Contest 2013 has started

posted by DSCT.com editors | Jun 6, 2013

Radiologists and radiographers from across the world can now submit their best images to the Right Dose Image Contest 2013. Read more

Automated attenuation-based kilovoltage selection: preliminary observations in patients after endovascular aneurysm repair of the abdominal aorta

posted by Hatem Alkadhi, M.D., M.P.H., E.B.C.R. | May 27, 2013
Hatem Alkadhi, M.D., M.P.H., E.B.C.R.

The objective of our study was to assess prospectively the impact of automated attenuation-based kilovoltage selection on image quality and radiation dose in patients undergoing body CTA after endovascular aneurysm repair (EVAR) of the abdominal aorta. Read more

Stenosis quantification in coronary CT angiography: impact of an integrated circuit detector with iterative reconstruction

posted by Sebastian Leschka, M.D. | May 21, 2013
Sebastian Leschka, M.D.

The objective of this study was to assess the value of an integrated circuit detector, potentially improving spatial resolution by means of reduced cross talk between detector channels, in coronary CT angiography regarding image quality and stenosis quantification compared with conventional detector technology. Read more

Systematic analysis on the relationship between luminal enhancement, convolution kernel, plaque density, and luminal diameter of coronary artery stenosis: a CT phantom study

posted by Sebastian Leschka, M.D. | May 19, 2013
Sebastian Leschka, M.D.

To systematically investigate into the relationships between luminal enhancement, convolution kernel, plaque density, and stenosis severity in coronary CT angiography. Read more

Case: Optimization of Contrast Dose CT with PE protocol with only 33cc contrast in a patient with a BMI of 53

posted by Robert Chapman Gilkeson, M.D. | May 13, 2013
Robert Chapman Gilkeson, M.D.
  • Axial CT slice showing thrombus (red arrow) within the right lower lobe pulmonary artery.
  • Coronal MPR image showing large right lower lobe pulmonary artery thrombus (red arrow).
  • Coronal Volume rendered image showing extent of right lower lobe thrombus (blue arrow).
  • Coronal Volume Rendered imaging highlighting course of pulmonary vessels, and this patients right lower lobe pulmonary artery thrombus (red arrow).

We show here that cardiac output, and blood volume in itself does not necessitate a larger dose. Read more

Transcatheter Aortic Valve Replacement: Performance of an Aortic Valvular Complex Model for Semi-Automated Quantification of Aortic Annulus Dimensions at Cardiac CT

posted by U. Joseph Schoepf, M.D. | May 8, 2013
U. Joseph Schoepf, M.D.

Our 3D aortic valvular complex model allows semi-automated, patient specific morphologic aortic annulus assessment with excellent agreement compared to manual measurement. Read more

Image quality of ultra-low radiation exposure coronary CTA with an effective dose <0.1 mSv using high-pitch spiral acquisition and raw data-based iterative reconstruction

posted by Michael M. Lell, M.D. | Apr 30, 2013
Michael M. Lell, M.D.

We evaluated the potential of prospectively ECG-triggered high-pitch spiral acquisition with low tube voltage and current in combination with iterative reconstruction to achieve coronary CT angiography with sufficient image quality at an effective dose below 0.1 mSv. Read more

Coronary CT angiography: Comparison of a novel iterative reconstruction with filtered back projection for reconstruction of low-dose CT—Initial experience

posted by U. Joseph Schoepf, M.D. | Apr 22, 2013
U. Joseph Schoepf, M.D.

To prospectively compare subjective and objective image quality in 20% tube current coronary CT angiography (cCTA) datasets between an iterative reconstruction algorithm (SAFIRE) and traditional filtered back projection (FBP). Read more

Low Kilovoltage CT of the Neck with 70 kVp: Comparison with a Standard Protocol

posted by Hatem Alkadhi, M.D., M.P.H., E.B.C.R. | Apr 15, 2013
Hatem Alkadhi, M.D., M.P.H., E.B.C.R.

The purpose of our study was to assess the image quality and radiation dose of neck CT at a tube potential of 70 kVp. Read more

Dual-energy lung perfusion and ventilation CT in children

posted by Hyun Woo Goo, M.D. | Apr 9, 2013
Hyun Woo Goo, M.D.

In this review, imaging protocols, analysis methods, clinical applications and diagnostic pitfalls of dual-energy thoracic CT for evaluating lung perfusion and ventilation in children are described. Read more

CARE Dose 4D and Dose Curves

posted by Ronald Booij | Apr 5, 2013
Ronald Booij

Tips and tricks are provided for a possible setup of scan settings for different body regions in adult but especially in child protocols. Read more

Cardiovascular CT angiography in neonates and children: Image quality and potential for radiation dose reduction with iterative image reconstruction techniques

posted by U. Joseph Schoepf, M.D. | Apr 3, 2013
U. Joseph Schoepf, M.D.

IR improves image noise, SNR, CNR and subjective image quality compared with FBP in low-radiation-dose paediatric CTA and allows further dose reductions without compromising diagnostic image quality. Read more

Diagnostic Performance of Reducing the Dose with 100kVp Scan in Assessment of Acute Pulmonary Embolism Utilizing Ultra-High Pitch Imaging

posted by Savvas Nicolaou, M.D. | Mar 28, 2013
Savvas Nicolaou, M.D.

Significant dose reduction of greater than 50% in the assessment of acute pulmonary embolism can be achieved without compromising diagnostic image quality by decreasing the kVp from 120 to 100kVp utilizing ultra-high-pitch imaging. Read more

Choosing the optimal wall shear parameter for the prediction of plaque location-A patient-specific computational study in human left coronary arteries

posted by Hatem Alkadhi, M.D., M.P.H., E.B.C.R. | Mar 25, 2013
Hatem Alkadhi, M.D., M.P.H., E.B.C.R.

Here we determine the performance of said wall shear parameters in the LCA for the prediction of plaque development locations and compare these results to those previously found in the RCA. Read more

Radiation dose considerations by intra-individual Monte Carlo simulations in dual source spiral coronary CTA with electrocardiogram-triggered tube current modulation and adaptive pitch

posted by Michael M. Lell, M.D. | Mar 20, 2013
Michael M. Lell, M.D.

Objectives To evaluate radiation dose levels in patients undergoing spiral coronary computed tomography angiography (CTA) on a dual-source system in clinical routine. Materials and methods Coronary CTA was performed for 56 patients with electrocardiogram-triggered tube current modulation (TCM) and heart-rate (HR) dependent pitch adaptation. Individual Monte Carlo (MC) simulations were performed for dose … Read more

Monoenergetic Extrapolation of Cardiac Dual Energy CT for Artifact Reduction

posted by U. Joseph Schoepf, M.D. | Mar 15, 2013
U. Joseph Schoepf, M.D.

The purpose of our investigation was to evaluate monoenergetic extrapolation of cardiac dual-energy CT (DECT) data for the potential of reducing artifacts from metal and high iodine contrast concentration. Read more

MRI and CT in the diagnosis of coronary artery disease: indications and applications

posted by Hatem Alkadhi, M.D., M.P.H., E.B.C.R. | Mar 11, 2013
Hatem Alkadhi, M.D., M.P.H., E.B.C.R.

In this review, the major aspects of non-invasive MR and CT imaging in the diagnosis of CAD will be discussed. Read more

Normalized metal artifact reduction in head and neck CT

posted by Michael M. Lell, M.D. | Mar 5, 2013
Michael M. Lell, M.D.

We developed a generalized normalization technique for MAR (NMAR) that aims to suppress algorithm-induced artifacts and validated the performance of this algorithm in a clinical trial. Read more

Enhanced temporal resolution at cardiac CT with a novel CT image reconstruction algorithm: Initial patient experience

posted by U. Joseph Schoepf, M.D. | Mar 1, 2013
U. Joseph Schoepf, M.D.

To evaluate the effect of a temporal resolution improvement method (TRIM) for cardiac CT on diagnostic image quality for coronary artery assessment. Read more

Dual- and multi-energy CT: approach to functional imaging

posted by Hatem Alkadhi, M.D., M.P.H., E.B.C.R. | Feb 26, 2013
Hatem Alkadhi, M.D., M.P.H., E.B.C.R.

This article reviews the principles of dual- and multi-energy CT imaging, hardware approaches and clinical applications. Read more

Dual-Energy CT of the Heart

posted by U. Joseph Schoepf, M.D. | Feb 22, 2013
U. Joseph Schoepf, M.D.

Compared with dynamic CT approaches, DECT has advantages regarding radiation dose and clinical applicability. In this review, the literature on DECT of the heart is discussed. Read more

Automated tube potential selection for standard chest and abdominal CT in follow-up patients with testicular cancer: comparison with fixed tube potential

posted by Hatem Alkadhi, M.D., M.P.H., E.B.C.R. | Feb 19, 2013
Hatem Alkadhi, M.D., M.P.H., E.B.C.R.

To evaluate prospectively, in patients with testicular cancer, the radiation dose-saving potential and image quality of contrast-enhanced chest and abdominal CT with automated tube potential selection. Read more

Easy use of FAST Adjust

posted by Ronald Booij | Feb 14, 2013
Ronald Booij

This section provides tips and tricks for the configuration of FAST Adjust. Read more

Diagnostic Performance of Dual-Energy CT for the Detection of Traumatic Bone Marrow Lesions in the Ankle: Comparison with MR Imaging

posted by Hatem Alkadhi, M.D., M.P.H., E.B.C.R. | Feb 12, 2013
Hatem Alkadhi, M.D., M.P.H., E.B.C.R.

To evaluate prospectively the performance of noncalcium images reconstructed from dual-energy (DE) CT for the diagnosis of bone marrow lesions in patients with acute ankle joint trauma in comparison with MR images. Read more

Radiation Dose and Image Quality at High-Pitch CTA of the Aorta: Intra-individual and Inter-individual Comparisons With Conventional CTA

posted by U. Joseph Schoepf, M.D. | Feb 4, 2013
U. Joseph Schoepf, M.D.

The objective of our study was to evaluate radiation dose and quantitative image quality parameters at high-pitch CT angiography (CTA) of the aorta compared with conventional CTA. Read more

Dual-Energy CT: A Promising New Technique for Assessment of the Musculoskeletal System

posted by Savvas Nicolaou, M.D. | Jan 30, 2013
Savvas Nicolaou, M.D.

The most validated application of DECT is undoubtedly its noninvasive and highly specific ability for confirming the presence of monosodium urate deposits in the assessment of gout. Read more

Dual-Energy CT: Radiation Dose Aspects

posted by U. Joseph Schoepf, M.D. | Jan 24, 2013
U. Joseph Schoepf, M.D.

The purpose of this article is to review the available literature regarding the radiation dose associated with DECT imaging applications in comparison with conventional single-energy CT techniques. Read more

Attenuation-based automatic kilovolt selection in abdominal CT: effects on radiation exposure and image quality

posted by Michael M. Lell, M.D. | Jan 21, 2013
Michael M. Lell, M.D.

We sought to evaluate an attenuation-based fully automated kV-selection and milliampere second-adaption algorithm for CT and to assess radiation dose and image quality in comparison with a standard 120 kV protocol in contrast-enhanced (CE) portal-venous thoracoabdominal imaging. Read more

Liver perfusion imaging in patients with primary and metastatic liver malignancy: prospective comparison between 99mTc-MAA spect and dynamic CT perfusion

posted by Hatem Alkadhi, M.D., M.P.H., E.B.C.R. | Jan 17, 2013
Hatem Alkadhi, M.D., M.P.H., E.B.C.R.

To prospectively analyze the correlation between parameters of liver perfusion from technetium99m-macroaggregates of albumin (99mTc-MAA) single photon emission CT (SPECT) with those obtained from dynamic CT perfusion in patients with primary or metastatic liver malignancy. Read more

Dual-Energy CT of the Lung

posted by U. Joseph Schoepf, M.D. | Jan 14, 2013
U. Joseph Schoepf, M.D.

This article reviews the current applications of DECT-based imaging techniques in the chest with an emphasis on the diagnosis and characterization of pulmonary thromboembolic disorders. Read more

Presentation: Clinical Utility of Dose Reduction in Suspected Pulmonary Embolism Imaging utilizing SAFIRE

posted by Savvas Nicolaou, M.D. | Jan 10, 2013
Savvas Nicolaou, M.D.

The presentation assesses the utility of SAFIRE (sinogram affirmed iterative reconstruction) to allow a dose reduction in assessment of PE with ultra-high pitch imaging by decreasing the voltage, yet still maintaining diagnostic image quality. Read more

Routine chest and abdominal high-pitch CT: an alternative low dose protocol with preserved image quality

posted by Hatem Alkadhi, M.D., M.P.H., E.B.C.R. | Jan 7, 2013
Hatem Alkadhi, M.D., M.P.H., E.B.C.R.

To investigate the radiation dose and image quality of the high-pitch DSCT for routine chest and abdominal scans. Read more