Repositioning precision of coronary arteries measured on X-ray angiography and its implications for coronary MR angiography.

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State: Public
Version: Final published version
License: All rights reserved
Serval ID
serval:BIB_1096D621EC47
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Repositioning precision of coronary arteries measured on X-ray angiography and its implications for coronary MR angiography.
Journal
Journal of Magnetic Resonance Imaging
Author(s)
Coppo S., Firsova M., Locca D., Knebel J.F., van Heeswijk R.B., Stuber M.
ISSN
1522-2586 (Electronic)
ISSN-L
1053-1807
Publication state
Published
Issued date
05/2015
Peer-reviewed
Oui
Volume
41
Number
5
Pages
1251-1258
Language
english
Notes
Publication types: Journal Article Publication Status: ppublish
Abstract
BACKGROUND: To test the hypothesis that intervals with superior beat-to-beat coronary artery repositioning precision exist in the cardiac cycle, to design a coronary MR angiography (MRA) methodology in response, and to ascertain its performance.
METHODS: Coronary repositioning precision in consecutive heartbeats was measured on x-ray coronary angiograms of 17 patients and periods with the highest repositioning precision were identified. In response, the temporal order of coronary MRA pulse sequence elements required modification and the T2 -prep now follows (T2 -post) rather than precedes the imaging part of the sequence. The performance of T2 -post was quantitatively compared (signal-to-noise [SNR], contrast-to-noise [CNR], vessel sharpness) to that of T2 -prep in vivo.
RESULTS: Coronary repositioning precision is <1 mm at peak systole and in mid diastole. When comparing systolic T2 -post to diastolic T2 -prep, CNR and vessel sharpness remained unchanged (both P = NS) but SNR for muscle and blood increased by 104% and 36% (both P < 0.05), respectively.
CONCLUSION: Windows with improved coronary repositioning precision exist in the cardiac cycle: one in peak systole and one in mid diastole. Peak-systolic imaging necessitates a re-design of conventional coronary MRA pulse sequences and leads to image quality very similar to that of conventional mid-diastolic data acquisition but improved SNR. J. Magn. Reson. Imaging 2015;41:1251-1258. © 2014 Wiley Periodicals, Inc.
Pubmed
Web of science
Open Access
Yes
Create date
20/04/2015 15:13
Last modification date
20/08/2019 13:37
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