| Lung Image Quality with 320-row Wide-volume CT Scans: The Effect of Prospective ECG-gating and Comparisons with 64-row Helical CT Scans. | |
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MedLine Citation:
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PMID: 22222025 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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RATIONALES AND OBJECTIVES: To evaluate the image quality of 320-row wide-volume (WV) computed tomography (CT) scans in comparison with 64-row helical scans for the lung. MATERIALS AND METHODS: The Institutional Review Board of each institution approved this prospective, multicenter study and informed consent was obtained. A total of 73 subjects underwent two types of chest CT, including 320-row WV scans and 64-row helical scans. Both scans used the same tube voltage, tube current, exposure time setting, and slice thickness. The helical scans were not electrocardiogram (ECG)-gated. For the WV scans, prospective ECG-gating was used for 38 subjects, whereas the other 35 subjects did not have ECG-gating. Using a 5-point scale from 1 (nondiagnostic) to 5 (excellent), three blinded observers independently evaluated image quality for five lobes and the lingula. The differences in the scores between WV scans and helical scans were compared using Wilcoxon's signed-rank test. RESULTS: The WV scans with ECG-gating had significantly higher scores than 64-row helical scans for all lobes and lingula (right lower lobe, P < .01; other lobes and lingula, P < .0001, respectively). The 320-row WV scans without ECG-gating also had significantly higher scores than 64-row helical scans (P < .05), except for nonsignificant differences for the left upper lobe. CONCLUSIONS: Lung image quality of ECG-gated WV scans, which do not require any additional radiation exposure, is better than that of non-ECG-gated 64-row helical scans. Non-ECG-gated 320-row WV scans are comparable or slightly superior to non-ECG-gated 64-row helical scans. |
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Authors:
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Tsuneo Yamashiro; Tetsuhiro Miyara; Masashi Takahashi; Ayano Kikuyama; Hisashi Kamiya; Hisanobu Koyama; Yoshiharu Ohno; Hiroshi Moriya; Mitsuru Matsuki; Yuko Tanaka; Satoshi Noma; Sadayuki Murayama; |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-1-3 |
Journal Detail:
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Title: Academic radiology Volume: - ISSN: 1878-4046 ISO Abbreviation: - Publication Date: 2012 Jan |
Date Detail:
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Created Date: 2012-1-6 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9440159 Medline TA: Acad Radiol Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2012 AUR. Published by Elsevier Inc. All rights reserved. |
Affiliation:
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Department of Radiology, Graduate School of Medical Science, University of the Ryukyus, 207 Uehara, Nishihara, Okinawa 903-0215, Japan. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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