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https://www.readbyqxmd.com/read/28029558/radiation-dose-levels-of-retrospectively-ecg-gated-coronary-ct-angiography-using-70-kvp-tube-voltage-in-patients-with-high-or-irregular-heart-rates
#1
Mathias Meyer, Holger Haubenreisser, Uwe Joseph Schoepf, Rozemarijn Vliegenthart, Melissa M Ong, Christina Doesch, Sonja Sudarski, Martin Borggrefe, Stefan O Schoenberg, Thomas Henzler
RATIONALE AND OBJECTIVES: Despite ongoing technical refinements, coronary computed tomography angiography (cCTA) remains challenging in its diagnostic value by electrocardiographic (ECG) misregistration and motion artifacts, which commonly occur in patients with atrial fibrillation and high or irregular heart rates. The aim of this study was to evaluate the radiation dose and the number of inconclusive coronary segments at cCTA using retrospective ECG gating at 100 and 70 kV. MATERIALS AND METHODS: With institutional review board approval, 154 patients (median age 54 years, 98 men) with high or irregular heart rate prospectively underwent retrospectively ECG-gated cCTA without tube current modulation on a third-generation dual-source computed tomography (DSCT) system at 70 kV (n = 103) or on a second-generation DSCT system at 100 kV (n = 51)...
October 28, 2016: Academic Radiology
https://www.readbyqxmd.com/read/28027768/the-evolution-of-radiation-dose-over-time-measurement-of-a-patient-cohort-undergoing-whole-body-examinations-on-three-computer-tomography-generations
#2
Roy P Marcus, Elise Koerner, Roland C Aydin, Dominik Zinsser, Tobias Finke, Christian J Cyron, Fabian Bamberg, Konstantin Nikolaou, Mike Notohamiprodjo
OBJECTIVES: To evaluate and compare the radiation dose and image quality of whole-body-CT (WBCT) performed on the 3rd-generation dual-source-CT (DSCT) with 2nd-generation DSCT and 64-slices-Single-Source-CT (SSCT) in a large patient cohort. MATERIAL AND METHODS: Using a monitoring and tracking software 1451, 747 and 1861 patients scanned with a one-spiral-thorax-abdomen-pelvis-CT-examination on a 3rd-, 2nd-generation DSCT and SSCT, respectively, were extracted from the PACS server...
January 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28027760/ct-angiography-for-planning-transcatheter-aortic-valve-replacement-using-automated-tube-voltage-selection-image-quality-and-radiation-exposure
#3
Stefanie Mangold, Carlo N De Cecco, U Joseph Schoepf, Taylor S Kuhlman, Akos Varga-Szemes, Damiano Caruso, Taylor M Duguay, Christian Tesche, Thomas J Vogl, Konstantin Nikolaou, Daniel H Steinberg, Julian L Wichmann
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). MATERIAL AND METHODS: We evaluated 125 patients who underwent TAVR-planning CTA on 3rd generation DSCT. A two-part protocol was performed including retrospectively ECG-gated coronary CTA (CCTA) and prospectively ECG-triggered aortoiliac CTA using 60mL of contrast medium. Automated tube voltage selection and advanced iterative reconstruction were applied...
January 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/27966335/radiation-dose-to-breasts-from-a-cardiac-computed-tomography-angiographyscanogram-can-be-reduced-by-switching-tube-position
#4
Mustafa Erdem Sağsöz, Rüstem Berhan Pirimoğlu
BACKGROUND/AIM: In a computed tomography (CT) examination, scanogram images are used to determine the range of the area to be imaged before scanning. The importance of scanogram image exposure has increased since total examination radiation has decreased due to technological advancements. The purpose of this study was to determine and compare radiation doses delivered to patients while the tube was in anterior-posterior (AP) and posterior-anterior (PA) positions during a CT angiography scanogram...
November 17, 2016: Turkish Journal of Medical Sciences
https://www.readbyqxmd.com/read/27928222/performance-of-dual-source-ct-with-high-pitch-spiral-mode-for-coronary-stent-patency-compared-with-invasive-coronary-angiography
#5
Xia Yang, Qiang Yu, Wei Dong, Zhen-Hong Fu, Jun-Jue Yang, Jun Guo, Yun-Dai Chen
OBJECTIVE: To investigate the performance of dual-source computed tomography (DSCT) using high-pitch spiral (HPS) mode for coronary stents patency. METHODS: We conducted a prospective study on 120 patients with 260 previous stents implanted due to recurred suspicious symptoms of angina scheduled for invasive coronary angiography (ICA), while DSCT were conducted using HPS mode. RESULTS: There was no significant impact of age, body mass index or heat rate (HR) on image quality (P > 0...
October 2016: Journal of Geriatric Cardiology: JGC
https://www.readbyqxmd.com/read/27863365/preoperative-evaluation-of-coronary-artery-fistula-using-dual-source-computed-tomography
#6
Ke Shi, Hong-Ling Gao, Zhi-Gang Yang, Qin Zhang, Xi Liu, Ying-Kun Guo
OBJECTIVES: To evaluate the efficacy of dual-source computed tomography (DSCT) in assessing the morphological features, quantitative features, and associated coronary artery lesions among patients with coronary artery fistula (CAF) before surgery. METHODS: We enrolled 34 patients with CAF that were morphologically and quantitatively analyzed by DSCT and compared the analyses with surgical results (reference standard). The associated coronary artery lesions were also assessed...
February 1, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/27862910/dynamic-updating-atlas-for-heart-segmentation-with-a-nonlinear-field-based-model
#7
Ken Cai, Rongqian Yang, Hongwei Yue, Lihua Li, Shanxing Ou, Feng Liu
BACKGROUND: Segmentation of cardiac computed tomography (CT) images is an effective method for assessing the dynamic function of the heart and lungs. In the atlas-based heart segmentation approach, the quality of segmentation usually relies upon atlas images, and the selection of those reference images is a key step. The optimal goal in this selection process is to have the reference images as close to the target image as possible. METHODS: This study proposes an atlas dynamic update algorithm using a scheme of nonlinear deformation field...
November 9, 2016: International Journal of Medical Robotics + Computer Assisted Surgery: MRCAS
https://www.readbyqxmd.com/read/27833784/computed-tomography-angiography-with-a-192-slice-dual-source-computed-tomography-system-improvements-in-image-quality-and-radiation-dose
#8
Philip V M Linsen, Adriaan Coenen, Marisa M Lubbers, Marcel L Dijkshoorn, Mohamed Ouhlous, Koen Nieman
PURPOSE: This study aims to compare image quality, radiation dose, and the influence of the heart rate on image quality of high-pitch spiral coronary computed tomography angiography (CCTA) using 128-slice (second generation) dual-source CT (DSCT) and a 192-slice DSCT (third generation) scanner. MATERIALS AND METHODS: Two consecutive cohorts of fifty patients underwent CCTA by high-pitch spiral scan mode using 128 or 192-slice DSCT. The 192-slice DSCT system has a more powerful roentgen tube (2 × 120 kW) that allows CCTA acquisition at lower tube voltages, wider longitudinal coverage for faster table speed (732 m/s), and the use of iterative reconstruction...
2016: Journal of Clinical Imaging Science
https://www.readbyqxmd.com/read/27752040/image-quality-and-radiation-dose-for-prospectively-triggered-coronary-ct-angiography-128-slice-single-source-ct-versus-first-generation-64-slice-dual-source-ct
#9
Jin Gu, He-Shui Shi, Ping Han, Jie Yu, Gui-Na Ma, Sheng Wu
This study sought to compare the image quality and radiation dose of coronary computed tomography angiography (CCTA) from prospectively triggered 128-slice CT (128-MSCT) versus dual-source 64-slice CT (DSCT). The study was approved by the Medical Ethics Committee at Tongji Medical College of Huazhong University of Science and Technology. Eighty consecutive patients with stable heart rates lower than 70 bpm were enrolled. Forty patients were scanned with 128-MSCT, and the other 40 patients were scanned with DSCT...
October 18, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27724954/single-source-chest-abdomen-pelvis-cancer-staging-on-a-third-generation-dual-source-ct-system-comparison-of-automated-tube-potential-selection-to-second-generation-dual-source-ct
#10
COMPARATIVE STUDY
Clara Park, Tatjana Gruber-Rouh, Doris Leithner, Amelie Zierden, Mortiz H Albrecht, Julian L Wichmann, Boris Bodelle, Mohamed Elsabaie, Jan-Erik Scholtz, Moritz Kaup, Thomas J Vogl, Martin Beeres
BACKGROUND: Evaluation of latest generation automated attenuation-based tube potential selection (ATPS) impact on image quality and radiation dose in contrast-enhanced chest-abdomen-pelvis computed tomography examinations for gynaecologic cancer staging. METHODS: This IRB approved single-centre, observer-blinded retrospective study with a waiver for informed consent included a total of 100 patients with contrast-enhanced chest-abdomen-pelvis CT for gynaecologic cancer staging...
October 10, 2016: Cancer Imaging: the Official Publication of the International Cancer Imaging Society
https://www.readbyqxmd.com/read/27703660/dual-source-computed-tomography-evaluation-of-children-with-congenital-pulmonary-valve-stenosis
#11
Zhanguo Sun, Wenjian Xu, Shuran Huang, Yueqin Chen, Xiang Guo, Zhitao Shi
BACKGROUND: Despite dual-source computed tomography (DSCT) technology has been performed well on adults or infants with heart disease, specific knowledge about children with congenital pulmonary valve stenosis (PS) remained to be established. OBJECTIVES: This original research aimed to establish a professional approach of DSCT performing technology on children and to assess the image quality performed by DSCT to establish a diagnostic evaluation for children with PS...
April 2016: Iranian Journal of Radiology: a Quarterly Journal Published By the Iranian Radiological Society
https://www.readbyqxmd.com/read/27682312/diagnostic-accuracy-of-coronary-ct-angiography-using-3-rd-generation-dual-source-ct-and-automated-tube-voltage-selection-clinical-application-in-a-non-obese-and-obese-patient-population
#12
Stefanie Mangold, Julian L Wichmann, U Joseph Schoepf, Damiano Caruso, Christian Tesche, Daniel H Steinberg, Akos Varga-Szemes, Andrew C Stubenrauch, Richard R Bayer, Matthew Biancalana, Konstantin Nikolaou, Carlo N De Cecco
PURPOSE: To investigate diagnostic accuracy of 3(rd)-generation dual-source CT (DSCT) coronary angiography in obese and non-obese patients. METHODS: We retrospectively analyzed 76 patients who underwent coronary CT angiography (CCTA) and invasive coronary angiography. Prospectively ECG-triggered acquisition was performed with automated tube voltage selection (ATVS). Patients were dichotomized based on body mass index in groups A (<30 kg/m(2), n = 37) and B (≥30 kg/m(2), n = 39) and based on tube voltage in groups C (<120 kV, n = 46) and D (120 kV, n = 30)...
September 28, 2016: European Radiology
https://www.readbyqxmd.com/read/27679698/diagnostic-accuracy-of-dual-source-computerized-tomography-coronary-angiography-in-symptomatic-patients-presenting-to-a-referral-cardiovascular-center-during-daily-clinical-practice
#13
Arash Mahdavi, Ali Mohammadzadeh, Golsa Joodi, Mohammad Reza Tabatabaei, Farhad Sheikholeslami, Marzieh Motevalli
BACKGROUND: There are numerous studies that address the diagnostic value of dual-source computed tomography (DSCT) as an alternative to conventional coronary angiography (CCA). However, the benefit of application of DSCT in a real world clinical setting should be evaluated. OBJECTIVES: To determine the diagnostic accuracy of DSCT technique compared with CCA as the gold standard method in detection of coronary artery stenosis among symptomatic patients who are presented to a referral cardiovascular center during daily clinical practice...
April 2016: Iranian Journal of Radiology: a Quarterly Journal Published By the Iranian Radiological Society
https://www.readbyqxmd.com/read/27633455/application-of-dual-source-ct-coronary-angiography-in-type-2-diabetic-patients-with-symptomatic-coronary-heart-disease
#14
Ci He, Peng Wang, Fei-Zhou Du, Zhi-Gang Yang
OBJECTIVE: To evaluate the epidemiological and morphological characteristics of coronary plaque in diabetic patients with symptomatic coronary heart disease (CHD) by dual-source computed tomography (DSCT). MATERIALS AND METHODS: From June 2013 to December 2014, 267 consecutive patients with type 2 diabetes mellitus were examined by DSCT. Plaque type, distribution, as well as extent and obstructive characteristics were determined for each segment. RESULTS: A total of 225 patients were included in the final study...
2017: Current Vascular Pharmacology
https://www.readbyqxmd.com/read/27610284/analysis-of-pulmonary-vein-antrums-motion-with-cardiac-contraction-using-dual-source-computed-tomography
#15
Houda Bahig, Jacques de Guise, Toni Vu, Carl Chartrand-Lefebvre, Danis Blais, Martin Lebeau, Nhu-Tram Nguyen, David Roberge
PURPOSE: The purpose of the study was to determine the extent of displacement of the pulmonary vein antrums resulting from the intrinsic motion of the heart using 4D cardiac dual-source computed tomography (DSCT). METHODS: Ten consecutive female patients were enrolled in this prospective planning study. In breath-hold, a contrast-injected cardiac 4-dimensional (4D) computed tomography (CT) synchronized to the electrocardiogram was obtained using a prospective sequential acquisition method including the extreme phases of systole and diastole...
2016: Curēus
https://www.readbyqxmd.com/read/27570804/low-dose-time-resolved-ct-angiography-in-pediatric-patients-with-venous-malformations-using-3rd-generation-dual-source-ct-initial-experience
#16
Thomas Henzler, Nils Vogler, Bettina Lange, Franz Dally, Mathias Meyer, Stefan O Schoenberg, Maliha Sadick
OBJECTIVES: 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. METHODS: Between November 2014 and August 2015, seven children (2 male, 5 female; median age, 9 years; range 3-12 years) with suspected peripheral, non-cerebral, venous malformations were included in this feasibility study and underwent US, MRI and 4D-CTA...
2016: European Journal of Radiology Open
https://www.readbyqxmd.com/read/27553939/low-contrast-medium-volume-third-generation-dual-source-computed-tomography-angiography-for-transcatheter-aortic-valve-replacement-planning
#17
Lloyd M Felmly, Carlo N De Cecco, U Joseph Schoepf, Akos Varga-Szemes, Stefanie Mangold, Andrew D McQuiston, Sheldon E Litwin, Richard R Bayer, Thomas J Vogl, Julian L Wichmann
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). MATERIALS AND METHODS: Forty consecutive TAVR candidates prospectively underwent combined CTA of the aortic root and vascular access route (270 mgI/ml iodixanol). Patients were assigned to group A (second-generation dual-source CT [DSCT], 100 kV, 60 ml contrast, 4...
August 23, 2016: European Radiology
https://www.readbyqxmd.com/read/27552224/recent-update-on-radiation-dose-assessment-for-the-state-of-the-art-coronary-computed-tomography-angiography-protocols
#18
Sock Keow Tan, Chai Hong Yeong, Kwan Hoong Ng, Yang Faridah Abdul Aziz, Zhonghua Sun
OBJECTIVES: This study aimed to measure the absorbed doses in selected organs for prospectively ECG-triggered coronary computed tomography angiography (CCTA) using five different generations CT scanners in a female adult anthropomorphic phantom and to estimate the effective dose (HE). MATERIALS AND METHODS: Prospectively ECG-triggered CCTA was performed using five commercially available CT scanners: 64-detector-row single source CT (SSCT), 2 × 32-detector-row-dual source CT (DSCT), 2 × 64-detector-row DSCT and 320-detector-row SSCT scanners...
2016: PloS One
https://www.readbyqxmd.com/read/27504475/from-first-to-latest-imaging-technology-revisiting-the-first-mummy-investigated-with-x-ray-in-1896-by-using-dual-source-computed-tomography
#19
REVIEW
Stephanie Zesch, Stephanie Panzer, Wilfried Rosendahl, John W Nance, Stefan O Schönberg, Thomas Henzler
PURPOSE: The aim of this study was to systematically reinvestigate the first human mummy that was ever analyzed with X-ray imaging in 1896, using dual-source computed tomography (DSCT) in order to compare the earliest and latest imaging technologies, to estimate preservation, age at death, sex, anatomical variants, paleopathological findings, mummification, embalming and wrapping of the child mummy from ancient Egypt. Radiocarbon dating was used to determine the mummy's age and to specify the child's living period in the Egyptian chronology...
2016: European Journal of Radiology Open
https://www.readbyqxmd.com/read/27499817/cardiac-dual-source-computed-tomography-for-the-detection-of-left-main-compression-syndrome-in-patients-with-pulmonary-hyper-tension
#20
Eftychia Demerouti, Athanassios Manginas, Emmanouil Petrou, Spyridoula Katsilouli, Panagiotis Karyofillis, George Athanassopoulos, George Karatasakis, Ioannis Iakovou, Konstantinos Mihas, Irene Mastorakou
INTRODUCTION: Left Main Compression Syndrome (LMCS) represents an entity described as the extrinsic compression of the left main coronary artery (LMCA) by a dilated pulmonary artery (PA) trunk. We examined the presence of LMCS in patients with pulmonary hypertension (PH) using dual-source computed tomography (DSCT), as a non-invasive diagnostic tool. METHODS: The following parameters were measured: PA trunk diameter (PAD), the distance between PAD and LMCA (LMPA) and the distance between PA and aorta (AoPA)...
2016: Open Cardiovascular Medicine Journal
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