Sebastian Leschka
Sebastian Leschka, M.D.

Associate professor – Expert in CTA, emergency radiology, abdominal imaging

Curriculum vitae

All posts of Sebastian Leschka, M.D.

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

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

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

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

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

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

Dual-energy CT with tin filter technology for the discrimination of renal lesion proxies containing blood, protein, and contrast-agent. An experimental phantom study

posted by Sebastian Leschka, M.D. | Apr 4, 2011
Sebastian Leschka, M.D.

To differentiate proxy renal cystic lesions containing protein, blood, iodine contrast, or saline solutions using dual-energy CT (DECT) equipped with a new tin filter technology (TFT). Read more

High-pitch dual-source CT coronary angiography: systolic data acquisition at high heart rates

posted by Sebastian Leschka, M.D. | Feb 28, 2011
Sebastian Leschka, M.D.

To assess the effect of systolic data acquisition for ECG-triggered high-pitch CT on motion artefacts of coronary arteries in patients with high heart rates. Read more

High-pitch DSCT angiography of the aortic valve-aortic root complex without ECG-synchronization

posted by Sebastian Leschka, M.D. | Jan 26, 2011
Sebastian Leschka, M.D.

To compare image quality and radiation dose of high-pitch CTA of the aortic valve-aortic root complex with and without prospective ECG-gating compared to a retrospectively ECG-gated standard-pitch acquisition. Read more

High-pitch 128-slice DSCT for the assessment of coronary stents in a phantom model

posted by Sebastian Leschka, M.D. | Jan 4, 2011
Sebastian Leschka, M.D.

To evaluate the quality of stent lumen delineation using DSCT in the standard-pitch mode (SP) as compared to the high-pitch mode (HP) in a phantom study. Read more

Case: Exam for Ruptured Aneurysma

posted by Sebastian Leschka, M.D. | Mar 15, 2010
Sebastian Leschka, M.D.
  • Case: Exam for Ruptured Aneurysma
  • Case: Exam for Ruptured Aneurysma
  • Case: Exam for Ruptured Aneurysma
  • Case: Exam for Ruptured Aneurysma

Case history 81-year-old male presented for follow-up exam to indicate convalescence progress. 6 weeks before, he had been delivered for coiling and stent implantation due to ruptured aneurysm. He had complained about pain in the lower abdominal region. A day after the stent implantation a type II endoleakage had appeared. 4 … Read more

Diagnostic accuracy of high-pitch dual-source CT for the assessment of coronary stenoses: first experience

posted by Sebastian Leschka, M.D. | Oct 23, 2009
Sebastian Leschka, M.D.

The objective was to prospectively investigate the diagnostic accuracy of high-pitch (HP) dual-source computed tomography coronary angiography (CTCA) compared with catheter coronary angiography (CCA) for the diagnosis of significant coronary stenoses. Read more

Persistent Left Vena Cava Superior Draining Directly to the Left Atrium and Partial Anomalous Pulmonary Venous Return

posted by Sebastian Leschka, M.D. | Jul 24, 2009
Sebastian Leschka, M.D.

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

Persistent Left Vena Cava Superior Draining Directly to the Left Atrium and Partial Anomalous Pulmonary Venous Return

posted by Sebastian Leschka, M.D. | Jul 24, 2009
Sebastian Leschka, M.D.
  • dsct_fig1
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History A 55-year-old male patient (heart rate 75 bpm, body mass index 26.0 kg/sqm) suffered from progredient physical inefficiency and atypical chest pain since several months. Thoracic CT (non-ECG-gated) raised the suspicion of thrombosis of the innominate vein. There was also found a left mediastinal tubular contrast-enhanced structure which was suspected … Read more

Case: Persistent Left Vena Cava Superior Draining Directly to the Left Atrium and Partial Anomalous Pulmonary Venous Return

posted by Sebastian Leschka, M.D. | May 29, 2009
Sebastian Leschka, M.D.
  • fig1-plvcs
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  • fig3-plvcs
  • fig5-plvcs

History A 55-year-old male patient (heart rate 75 bpm, body mass index 26.0 kg/sqm) suffered from progredient physical inefficiency and atypical chest pain since several months. Thoracic CT (non-ECG-gated) raised the suspicion of thrombosis of the innominate vein. There was also found a left mediastinal tubular contrast-enhanced structure which was suspected … Read more

Dose reduction in DSCT compared to 64-MDCT

posted by Sebastian Leschka, M.D. | Jan 8, 2009
Sebastian Leschka, M.D.

Abrar Hayat, Kuwait, has sent the following question: dose reduction in DSCT compared to 64-MDCT: Other venders claim that they have upgraded their 64-MDCT with new applications so that the dose is reduced by 50 % compared to their regular 64-MDCT! how does the DSCT compare to those? Am I going to … Read more

Mono- versus bisegment reconstruction algorithms for dual-source computed tomography coronary angiography

posted by Sebastian Leschka, M.D. | Dec 22, 2008
Sebastian Leschka, M.D.

Objektive: To compare the image quality of mono- versus bisegment reconstruction algorithms for dual-source computed tomography coronary angiography (CTCA). Materials and methods: Eighty consecutive patients (27 women; average age, 60 +/- 12 years) were randomly assigned to 2 different CTCA scanning protocols: 40 patients (group A) underwent dual-source CTCA with a … Read more

Low kilovoltage cardiac dual-source CT: attenuation, noise, and radiation dose

posted by Sebastian Leschka, M.D. | Nov 16, 2008
Sebastian Leschka, M.D.

The purpose of this study was to investigate the effect of low kilovoltage dual-source computed tomography coronary angiography (CTCA) on qualitative and quantitative image quality parameters and radiation dose. Dual-source CTCA with retrospective ECG gating was performed in 80 consecutive … Read more

Prevalence and morphology of coronary artery ectasia with dual-source CT coronary angiography

posted by Sebastian Leschka, M.D. | Aug 19, 2008
Sebastian Leschka, M.D.

Abstract To assess the prevalence and morphological characteristics of coronary artery ectasia (CAE) with CT coronary angiography (CTCA) in comparison to conventional catheterangiography (CCA), Dual-source CTCA examinations from 677 consecutive patients (223 women; median age 57 years) were retrospectively evaluated by two blinded observers for the presence of CAE defined as … Read more




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