Julian L. Wichmann, M.D.

Resident in Diagnostic Radiology – Expert in Dual-Energy, Cardiovascular Imaging

Curriculum vitae

All posts of Julian L. Wichmann, M.D.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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




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