| Transthoracic Doppler echocardiography to predict optimal tube pulsing window for coronary artery CT angiography. | |
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MedLine Citation:
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PMID: 21930357 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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RATIONALE AND OBJECTIVE: To evaluate the feasibility of transthoracic Doppler echocardiography to determine the optimal pulsing windows for CT coronary angiography to narrow the pulsing windows further, especially in higher heart rate. MATERIALS AND METHODS: Doppler was performed on 135 patients before CT scanning. For Doppler, the intervals with minimal motion were evaluated during both systole and diastole integrating electrocardiogram (ECG) intervals. For CT scanning, the retrospective ECG-gating was applied and the optimal reconstruction intervals were determined. The accuracy of Doppler analysis to predict the optimal reconstruction intervals was tested. The predicted length of pulsing windows was compared between Doppler analysis and traditional prospective ECG-gating protocol (heart rate≦65bpm, 60-76%; 66-79bpm, 30-77%; ≧80bpm, 31-47%). RESULTS: According to Doppler analysis, the mean length of intervals with minimal motion in systole was 106.4±39.2ms and 125.2±92.0ms in diastole. When the intervals with minimal motion during diastole>90ms, the optimal reconstruction intervals were located at diastole; otherwise, at systole (P<0.001). The optimal reconstruction intervals in 93.8% (132/135) patients could be predicted accurately by Doppler analysis. If the optimal reconstruction intervals predicted by Doppler were applied as the exposure windows, the mean length of pulsing windows should has been 105.2±69.4ms (range: 26.9-510.3ms), which was significantly shorter than that of traditional prospective ECG-gating protocol (232.0±120.2ms, range: 93.2-427.3ms, P<0.001). CONCLUSION: Doppler can help detecting the optimal pulsing windows accurately. Prospective ECG-gating incorporating Doppler analysis may narrow pulsing windows significantly while maintaining image quality. |
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Authors:
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Gang Sun; Min Li; Xiang-Sen Jiang; Li Li; Zhao-Hui Peng; Nan-Nan Mu |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-9-17 |
Journal Detail:
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Title: European journal of radiology Volume: - ISSN: 1872-7727 ISO Abbreviation: - Publication Date: 2011 Sep |
Date Detail:
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Created Date: 2011-9-20 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8106411 Medline TA: Eur J Radiol Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Crown Copyright © 2011. Published by Elsevier Ireland Ltd. All rights reserved. |
Affiliation:
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Department of Medical Imaging, Jinan Military General Hospital, No. 25, Shifan Road, Jinan, Shandong Province 250031, China. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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