An iterative approach to respiratory self-navigated whole-heart coronary MRA significantly improves image quality in a preliminary patient study.

Détails

ID Serval
serval:BIB_60AF5DE4BA17
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
An iterative approach to respiratory self-navigated whole-heart coronary MRA significantly improves image quality in a preliminary patient study.
Périodique
Magnetic Resonance In Medicine
Auteur(s)
Ginami G., Bonanno G., Schwitter J., Stuber M., Piccini D.
ISSN
1522-2594 (Electronic)
ISSN-L
0740-3194
Statut éditorial
Publié
Date de publication
2016
Peer-reviewed
Oui
Volume
75
Numéro
4
Pages
1594-1604
Langue
anglais
Résumé
PURPOSE: In respiratory self-navigated coronary MRA, the selection of a reference position may have a direct effect on image quality. While end-expiration is commonly used as reference, it may be ill defined in cases of irregular breathing. Here, an iterative self-navigation approach that operates without a reference position was implemented and tested in healthy volunteers and patients.
METHODS: Data were acquired in 15 healthy volunteers and in 23 patients. Images obtained with end-expiratory self-navigation were compared with those obtained with the iterative approach that incorporates cross-correlation to iteratively minimize a global measure of respiratory displacement. Vessel sharpness, length, signal-to-noise ratio (SNR), and contrast-to-noise ratio (CNR) were evaluated while differences in breathing patterns between the two sub-groups were assessed, too.
RESULTS: Vessel sharpness and length were similar for both methods in healthy volunteers. In patients, a significant improvement in vessel sharpness and length was obtained using the iterative approach. SNR and CNR remained constant. While end-expiration was the most frequent respiratory phase in healthy volunteers (57.6 ± 16.2%), intermediate respiratory phases (43.4 ± 30.1%) were predominantly found in patients.
CONCLUSION: An iterative approach to respiratory motion correction in self-navigation may lead to significant improvements in coronary MRA image quality in patients with a less consistent end-expiratory respiratory phase. Magn Reson Med 75:1594-1604, 2016. © 2015 Wiley Periodicals, Inc.
Pubmed
Web of science
Création de la notice
26/04/2016 16:37
Dernière modification de la notice
20/08/2019 14:18
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