Výsledky vyhledávání - "Ralf W, Bauer"

Enhanced radiation exposure associated with anterior-posterior x-ray tube position in young women undergoing cardiac computed tomography

Autor: Catherine Gebhard, Moritz Schwyzer, Dominik C. Benz, Ralf W. Bauer, Philipp A. Kaufmann, Ronny R. Buechel, Aju P. Pazhenkottil, Anne-Laurène Panadero, Oliver Gaemperli, Michael Messerli, Andreas A. Giannopoulos, Christoph Gräni

Publikováno v: American Heart Journal. 215:91-94

Given the current increase in the incidence of coronary artery disease in younger women as well as the high lifetime risk of developing an x-ray-induced malignancy in this population, we aimed at assessing chest radiation in 206 women ≤55 years old

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::832112f3d4a57c32f7588eafc7748126
https://doi.org/10.1016/j.ahj.2019.05.006

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Comparison of virtual non-contrast dual-energy CT and a true non-contrast CT for contouring in radiotherapy of 3D printed lung tumour models in motion: a phantom study

Autor: Kai Kröger, Hans Theodor Eich, Ralf W. Bauer, Uwe Haverkamp, Dominik Alexander Hering

Publikováno v: Br J Radiol

Objectives: This work aims to investigate whether virtual non-contrast (VNC) dual-energy CT(DECT) of contrasted lung tumours can be used as an alternative for true non-contrast (TNC) images in radiotherapy. Two DECT techniques and a TNC CT were compa

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c4967facbe7953ec0abe44801c9e6e4c
https://europepmc.org/articles/PMC7715995/

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Influence of contrast material density and kV setting on detectability of calcified plaques on coronary CT angiography

Autor: Thomas J. Vogl, Ralf W. Bauer, Jan-Erik Scholtz, Claudia Frellesen, Doris Leithner, Christophe T. Arendt, Patricia Tischendorf

Publikováno v: European journal of radiology. 132

Purpose To analyze the impact of tube potential and iodine concentration on the visibility of calcified plaques in coronary computed tomography angiography (cCTA). Methods & Materials 164 consecutive patients (65.9 % men and a mean age of 57.1 ± 11.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::371e2f0f21803348644c199dcf9c0db1
https://pubmed.ncbi.nlm.nih.gov/32998080

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Coronary risk assessment at X-ray dose equivalent ungated chest CT: Results of a multi-reader study

Autor: Simon Wildermuth, Lukas Hechelhammer, Ralf W. Bauer, Sebastian Leschka, Michael Messerli, Rene Warschkow

Publikováno v: Clinical Imaging. 49:73-79

To determine the value of ultra-low dose chest CT with tin filtration for ordinal coronary artery calcium (CAC) risk scoring.50 patients were prospectively included and underwent clinical standard dose chest CT (1.8±0.7mSv) and ultra-low dose CT (0.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9a7f1fbdb97a32453302473497258161
https://doi.org/10.1016/j.clinimag.2017.10.014

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Using coronary CT angiography for guiding invasive coronary angiography: potential role to reduce intraprocedural radiation exposure

Autor: Michael Messerli, Robin F. Gohmann, Lucas Jörg, Christophe T. Arendt, Julian L. Wichmann, Simon Wildermuth, Patricia Tischendorf, Thomas J. Vogl, Ralf W. Bauer, Niklas F. Ehl

Publikováno v: European Radiology. 28:2756-2762

We investigated the potential reduction of patient exposure during invasive coronary angiography (ICA) if the procedure had only been directed to the vessel with at least one ≥ 50% stenosis as described in the CT report. Dose reports of 61 patients

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fcc78cf8d85c941a7cce2284aad616b8
https://doi.org/10.1007/s00330-018-5317-2

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Evaluation of an adaptive detector collimation for prospectively ECG-triggered coronary CT angiography with third-generation dual-source CT

Autor: Michael Messerli, Jan-Erik Scholtz, Ralf W. Bauer, Simon Wildermuth, Thomas J. Vogl, Patricia Dewes, Christophe T. Arendt

Publikováno v: European Radiology. 28:2143-2150

To investigate the impact of an adaptive detector collimation on the dose parameters and accurateness of scan length adaption at prospectively ECG-triggered sequential cardiac CT with a wide-detector third-generation dual-source CT. Ideal scan length

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4a2bcb54474f1c4098fab5359a35a7f7
https://doi.org/10.1007/s00330-017-5177-1

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High-pitch dual-source paranasal sinus CT in agitated patients with maxillofacial trauma: analysis of image quality, motion artifacts, and dose aspects

Autor: J Scholtz, Martin Beeres, Thomas J. Vogl, Julian L. Wichmann, Claudia Frellesen, Patricia Tischendorf, Ralf W. Bauer

Publikováno v: Acta Radiologica. 59:909-916

Background Image quality benefits from high-pitch scanning in agitated patients by reducing acquisition time. Purpose To compare image quality and exposure parameters in patients with maxillofacial trauma on second- and third-generation dual-source c

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1d6b6552f3d07301910cb40aaaa199a7
https://doi.org/10.1177/0284185117740931

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Emphysema quantification and lung volumetry in chest X-ray equivalent ultralow dose CT – Intra-individual comparison with standard dose CT

Autor: Ralf W. Bauer, Michael Messerli, Hatem Alkadhi, Rene Warschkow, Thorsten Ottilinger, Sebastian Leschka, Simon Wildermuth

Publikováno v: European Journal of Radiology. 91:1-9

Objectives To determine whether ultralow dose chest CT with tin filtration can be used for emphysema quantification and lung volumetry and to assess differences in emphysema measurements and lung volume between standard dose and ultralow dose CT scan

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d351c797ada50477fea79d72d92e070c
https://doi.org/10.1016/j.ejrad.2017.03.003

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

Autor: Doris Leithner, Boris Bodelle, Ralf W. Bauer, Dennis W. Bennett, Jan-Erik Scholtz, Julian L. Wichmann, Thomas J. Vogl

Publikováno v: American Journal of Roentgenology. 208:1089-1096

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).A total of 123 patient

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fe758d5c7029d9767da405278fa62ca4
https://doi.org/10.2214/ajr.16.17171

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Lung Cancer Screening with Submillisievert Chest CT: Potential Pitfalls of Pulmonary Findings in Different Readers with Various Experience Levels

Autor: Ralf W. Bauer, Katharina Martini, Michael Messerli, Nicola Glaser-Gallion, Christian Blüthgen, Thorsten Ottilinger, Bettina Serrallach, Sebastian Leschka, Simon Wildermuth, Stefan Markart

To assess the interreader variability of submillisievert CT for lung cancer screening in radiologists with various experience levels.Six radiologists with different degrees of clinical experience in radiology (range, 1-15 years), rated 100 submillisi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c591ba2738e7242f6f9b71c15865035e
https://doi.org/10.5167/uzh-176251

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