| Prospective electrocardiogram-gated axial 64-detector computed tomographic angiography vs retrospective gated helical technique to assess coronary artery bypass graft anastomosis: comparison of image quality and patient radiation dose. | |
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MedLine Citation:
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PMID: 20154407 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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BACKGROUND: In the present study the effective dose and image quality at distal anastomoses were retrospectively compared between prospective electrocardiogram (ECG)-gated axial and retrospective ECG-gated helical techniques on 64-detector computed tomographic (CT) angiography following coronary artery bypass graft surgery. METHODS AND RESULTS: Following bypass surgery, 52 patients with a heart rate <65 beats/min underwent CT angiography: 26 patients each with prospective and retrospective ECG gating techniques. The effective dose was compared between the 2 groups using a 4-point scale (4, excellent; 1, poor) to grade the quality of curved multiplanar reformation images at distal anastomoses. Patient characteristics of the 2 groups were well matched, and the same CT scan parameters were used for both, except for the interval between surgery and CT examination, tube current, and image noise index. Image quality scores did not differ significantly (3.26+/-0.95 vs 3.35+/-0.87; P=0.63), but the effective dose was significantly lower in the prospective (7.3+/-1.8 mSv) than in the retrospective gating group (23.6+/-4.5 mSv) (P<0.0001). CONCLUSIONS: Following bypass surgery, 64-detector CT angiography using prospective ECG gating is superior to retrospective gating in limiting the radiation dose and maintaining the image quality of distal anastomoses. |
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Authors:
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Haruhiko Machida; Ai Masukawa; Isao Tanaka; Rika Fukui; Kazufumi Suzuki; Eiko Ueno; Kojiro Kodera; Kiyoharu Nakano; Yun Shen |
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Publication Detail:
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Type: Comparative Study; Evaluation Studies; Journal Article Date: 2010-02-13 |
Journal Detail:
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Title: Circulation journal : official journal of the Japanese Circulation Society Volume: 74 ISSN: 1347-4820 ISO Abbreviation: Circ. J. Publication Date: 2010 Apr |
Date Detail:
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Created Date: 2010-03-26 Completed Date: 2010-07-15 Revised Date: 2011-02-18 |
Medline Journal Info:
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Nlm Unique ID: 101137683 Medline TA: Circ J Country: Japan |
Other Details:
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Languages: eng Pagination: 735-40 Citation Subset: IM |
Affiliation:
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Department of Radiology, Tokyo Women's Medical University Medical Center East, Tokyo, Japan. machira@dnh.twmu.ac.jp |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Aged Anastomosis, Surgical Coronary Angiography / methods* Coronary Artery Bypass* Coronary Artery Disease / radiography*, surgery* Diagnostic Imaging / standards Electrocardiography* Female Follow-Up Studies Humans Male Middle Aged Prospective Studies Radiation Dosage Retrospective Studies Sensitivity and Specificity Tomography, X-Ray Computed / methods* |
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