| Shorter delay time reduces interpatient variability in coronary enhancement in coronary CT angiography using the bolus tracking method with 320-row CT. | |
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MedLine Citation:
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PMID: 22527257 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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The purpose was to investigate the influence of shorter delay time on the interpatient variability in coronary enhancement and appropriateness of scan timing in coronary CT angiography (CTA) using bolus tracking method with 320-row CT. The bolus tracking scan was performed at the level of the bifurcation of the trachea for first 50 patients (group 1) and at the center level of the diagnostic scan for the last 50 patients (group 2). The CT number of the proximal coronary arteries was measured in the right coronary artery (RCA) and the left main trunk (LMT). The CT numbers of the right ventricle, left ventricle, ascending aorta, and descending aorta were also measured to consider the appropriateness of the scan timing. The delay time was longer in group 1 than in group 2 (7.0 vs. 2.6 s; p < 0.0001). The CT number within the RCA was 390 ± 75 HU for group 1 and 419 ± 42 HU for group 2. The CT number within the LMT was 396 ± 72 HU for group 1 and 420 ± 40 HU for group 2. The difference of average (p = 0.02 and 0.04) and standard deviation (p = 0.03 and 0.02) was statistically significant. The scan timing was early or late in 15 patients for group 1, but only 2 patients for group 2 (p = 0.0002). Shortening the delay time could reduce the interpatient variability in coronary enhancement with appropriate scan timing in coronary CTA. |
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Authors:
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Nobuo Tomizawa; Takeshi Nojo; Masaaki Akahane; Rumiko Torigoe; Shigeru Kiryu; Kuni Ohtomo |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-4-22 |
Journal Detail:
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Title: The international journal of cardiovascular imaging Volume: - ISSN: 1875-8312 ISO Abbreviation: - Publication Date: 2012 Apr |
Date Detail:
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Created Date: 2012-4-24 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 100969716 Medline TA: Int J Cardiovasc Imaging Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Department of Radiology, The University of Tokyo, 7-3-1 Hongo, Tokyo, 113-0033, Bunkyo-ku, Japan, tomizawa-tky@umin.ac.jp. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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