Improved SNR efficiency in gradient echo coronary MRA with high temporal resolution using parallel imaging.

Détails

ID Serval
serval:BIB_EF827F7BED80
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Improved SNR efficiency in gradient echo coronary MRA with high temporal resolution using parallel imaging.
Périodique
Magnetic Resonance in Medicine
Auteur⸱e⸱s
Yu J., Schär M., Vonken E.J., Kelle S., Stuber M.
ISSN
1522-2594[electronic], 0740-3194[linking]
Statut éditorial
Publié
Date de publication
2009
Volume
62
Numéro
5
Pages
1211-1220
Langue
anglais
Résumé
Contemporary coronary magnetic resonance angiography techniques suffer from signal-to-noise ratio (SNR) constraints. We propose a method to enhance SNR in gradient echo coronary magnetic resonance angiography by using sensitivity encoding (SENSE). While the use of sensitivity encoding to improve SNR seems counterintuitive, it can be exploited by reducing the number of radiofrequency excitations during the acquisition window while lowering the signal readout bandwidth, therefore improving the radiofrequency receive to radiofrequency transmit duty cycle. Under certain conditions, this leads to improved SNR. The use of sensitivity encoding for improved SNR in three-dimensional coronary magnetic resonance angiography is investigated using numerical simulations and an in vitro and an in vivo study. A maximum 55% SNR enhancement for coronary magnetic resonance angiography was found both in vitro and in vivo, which is well consistent with the numerical simulations. This method is most suitable for spoiled gradient echo coronary magnetic resonance angiography in which a high temporal and spatial resolution is required.
Mots-clé
Algorithms, Coronary Vessels/anatomy & histology, Image Enhancement/methods, Image Interpretation, Computer-Assisted/methods, Magnetic Resonance Angiography/methods, Reproducibility of Results, Sensitivity and Specificity
Pubmed
Web of science
Open Access
Oui
Création de la notice
02/03/2010 17:59
Dernière modification de la notice
20/08/2019 16:17
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