Thomas Werncke

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PURPOSE To evaluate the effect of automatic bone and plaque removal on image quality and grading of steno-occlusive lesions in patients undergoing dual energy CT angiography (CTA) of lower extremity. MATERIALS AND METHODS Dual energy (DE) runoff CTA was performed in 50 patients using the following parameters: collimation 2 x 32 x 0.6; tube potentials, 80(More)
AIMS Catheter ablation of the pulmonary veins (PVs) is a promising therapeutic approach for symptomatic atrial fibrillation (AF). The prospective randomized single-centre study 'Mesh Ablator versus Cryoballoon Pulmonary Vein Ablation of Symptomatic Paroxysmal Atrial Fibrillation' (MACPAF; NCT01061931) compared the efficacy and safety of(More)
Purpose To determine if C-Arm computed tomography (CACT) has added diagnostic value in patients suffering from chronic thromboembolic pulmonary hypertension (CTEPH) with a positive mismatch pattern in ventilation/perfusion single photon emission computed tomography (V/Q SPECT). Materials and Methods 28 patients (23 men, 5 women, 62 ± 18 years) with CTEPH(More)
OBJECTIVES The aim of this study was to assess the potential for radiation dose reduction in collimated C-arm computed tomography (CACT) while maintaining the image quality of the full field of view (FFOV) acquisition. MATERIAL AND METHODS A whole-body anthropomorphic phantom representing a 70-kg male was used in this study. The upper abdomen of the(More)
To retrospectively assess the influence of arterial wall calcifications on the accuracy of run-off computed tomographic angiography (CTA) and to analyse whether cardiovascular risk factors are predictors of compromising calcifications. In 200 consecutive patients who underwent run-off CTA, calcifications were assessed in pelvic, thigh and calf arteries(More)
To assess the influence of different table feeds (TFs) on vascular enhancement and image quality in patients with an abdominal aortic aneurysm (AAA) undergoing computed tomography (CT) angiography of the lower extremities (run-off CTA). Seventy-nine patients (71 ± 8 years) with an AAA (>30 mm) who underwent run-off CTA between January 2004 and August 2011(More)
PURPOSE To evaluate the accuracy of dual energy (DE)-based plaque removal in a vessel phantom. MATERIALS AND METHODS Acrylic vessel phantoms of different diameters (3, 5, 8 mm), degrees of stenoses (25 - 100%) and plaque densities (300 - 750 HU) were filled with contrast-enhanced blood (150 - 450 HU). Dual source CT was used for simultaneous image(More)
OBJECTIVES The aim of this study was to analyze the influence of the tube current-time product in multidetector computed tomography angiography on the accuracy of stenosis quantification in a phantom model of occlusive vessel disease. MATERIALS AND METHODS Stenosed pelvic and visceral arteries were simulated using acrylic tubes (inner diameter: small, 4.0(More)
AIM To evaluate run-off computed tomography angiography (CTA) of abdominal aorta and lower extremities for detecting musculoskeletal pathologies and clinically relevant extravascular incidental findings in patients with intermittent claudication (IC) and suspected peripheral arterial disease (PAD). Does run-off CTA allow image-based therapeutic decision(More)
To evaluate the feasibility of 2D-perfusion angiography (2D-PA) in order to quantify perfusion changes of the lung parenchyma pre- and post-balloon pulmonary angioplasty (BPA). Thirty consecutive interventions in 16 patients with 99 treated pulmonary artery segments were included. To quantify changes in pulmonary blood flow using 2D-PA, the acquired digital(More)