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Retrospective Gating vs. Prospective Triggering for Noninvasive Coronary Angiography: Assessment of Image Quality and Radiation Dose Using a 256-Slice CT Scanner with 270 ms Gantry Rotation
Wei-Yip Law1; Ching-Ching Yang1; Liang-Kuang Chen1,2; Tzung-Chi Huang3; Kun-Mu Lu1; Tung-Hsin Wu4; Greta S.P. Mok5,6
2011-01
Source PublicationACADEMIC RADIOLOGY
ISSN1076-6332
Volume18Issue:1Pages:31-39
Abstract

Objective: To report our clinical experience with a 256-slice multidetector computed tomography (MDCT) with a 270-ms gantry rotation system in performing CT coronary angiograms (CTCA) using both prospectively gated step and shoot (PGSS) and retrospectively gated helical (RGH) techniques.

Materials and Methods: We studied 252 patients who received CTCA; 126 patients having mean heart rate (HR) of 72.1 were imaged with RGH CTCA and 126 patients having mean HR of 58.7 were imaged with PGSS CTCA. For patients with a prescan HR <= 70 beats/min, a PGSS acquisitions trigger was used, whereas patients whose prescan HR was >70 beats/min were imaged using an RGH acquisition. The blood vessel accessibility of both PGSS and RGH techniques was evaluated by grading the image quality score from 1 (no motion artifacts) to 4 (severe motion artifacts preventing diagnosis) for each coronary artery segment. Radiation doses of the techniques were also compared.

Results: In both groups, more than 50% of segments received the best imaging score. The overall image quality scores for RGH and PGSS groups were 1.522 +/- 0.317 and 1.500 (+/-) 0.374, respectively. There was no significant difference in right coronary artery, left anterior descending artery, and left circumflex artery image quality between the two groups. Only 0.1% of segments were nonevaluative with the PGSS technique and all segments were evaluative with RGH. PGSS was associated with a 62% reduction in effective radiation dose as compared to RGH (PGSS, 5.1 mSv; RGH, 13.2 mSv).

Conclusions: There is no significant difference in image quality between PGSS and RGH in this study. Although providing similar image quality as RGH, PGSS was associated with a 62% reduction in effective radiation dose. Further study to confirm the diagnostic accuracy as compared to coronary artery angiography is warranted.

KeywordCoronary Angiography Coronary Artery Disease Ctca Radiation Dose Ct Coronary Angiogram
DOI10.1016/j.acra.2010.07.013
Indexed BySCIE
Language英语
WOS Research AreaRadiology, Nuclear Medicine & Medical Imaging
WOS SubjectRadiology, Nuclear Medicine & Medical Imaging
WOS IDWOS:000286018600005
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Citation statistics
Cited Times [WOS]:13   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionDEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING
Corresponding AuthorTung-Hsin Wu
Affiliation1.Department of Radiology, Shin Kong Wu Ho-Su Memorial Hospital, Taipei, Taiwan, R.O.C.
2.College of Medicine, Fu Jen Catholic University, Taipei, Taiwan, R.O.C.
3.Department of Biomedical Imaging and Radiological Science, China Medical University, Taiwan, R.O.C.
4.Department of Biomedical Imaging and Radiological Sciences, National Yang Ming University, 155 Li-Nong St., Sec. 2, Taipei, Taiwan 112, R.O.C.
5.Department of Electrical and Electronics Engineering, Faculty of Science and Technology, University of Macau, Macau
6.Department of Health Technology and Informatics, The Hong Kong Polytechnic University, Hong Kong
Recommended Citation
GB/T 7714
Wei-Yip Law,Ching-Ching Yang,Liang-Kuang Chen,et al. Retrospective Gating vs. Prospective Triggering for Noninvasive Coronary Angiography: Assessment of Image Quality and Radiation Dose Using a 256-Slice CT Scanner with 270 ms Gantry Rotation[J]. ACADEMIC RADIOLOGY,2011,18(1):31-39.
APA Wei-Yip Law.,Ching-Ching Yang.,Liang-Kuang Chen.,Tzung-Chi Huang.,Kun-Mu Lu.,...&Greta S.P. Mok.(2011).Retrospective Gating vs. Prospective Triggering for Noninvasive Coronary Angiography: Assessment of Image Quality and Radiation Dose Using a 256-Slice CT Scanner with 270 ms Gantry Rotation.ACADEMIC RADIOLOGY,18(1),31-39.
MLA Wei-Yip Law,et al."Retrospective Gating vs. Prospective Triggering for Noninvasive Coronary Angiography: Assessment of Image Quality and Radiation Dose Using a 256-Slice CT Scanner with 270 ms Gantry Rotation".ACADEMIC RADIOLOGY 18.1(2011):31-39.
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