Titre
Repositioning precision of coronary arteries measured on X-ray angiography and its implications for coronary MR angiography.
Type
article
Institution
UNIL/CHUV/Unisanté + institutions partenaires
Périodique
Auteur(s)
Coppo, S.
Auteure/Auteur
Firsova, M.
Auteure/Auteur
Locca, D.
Auteure/Auteur
Knebel, J.F.
Auteure/Auteur
van Heeswijk, R.B.
Auteure/Auteur
Stuber, M.
Auteure/Auteur
Liens vers les personnes
Liens vers les unités
ISSN
1522-2586
Statut éditorial
Publié
Date de publication
2015-05
Volume
41
Numéro
5
Première page
1251
Dernière page/numéro d’article
1258
Peer-reviewed
Oui
Langue
anglais
Notes
Publication types: Journal Article Publication Status: ppublish
Résumé
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.
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.
PID Serval
serval:BIB_1096D621EC47
PMID
Open Access
Oui
Date de création
2015-04-20T13:13:34.332Z
Date de création dans IRIS
2025-05-20T17:45:05Z
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Nom
Coppo_XrayRepositioningT2Post_JMRI2014.pdf
Version du manuscrit
published
Licence
https://iris.unil.ch/disclaimer
Taille
552.75 KB
Format
Adobe PDF
PID Serval
serval:BIB_1096D621EC47.P001
URN
urn:nbn:ch:serval-BIB_1096D621EC472
Somme de contrôle
(MD5):6113f19a696e542b4459b39ecb6abdd6