Flexible water excitation for fat-free MRI at 3T using lipid insensitive binomial off-resonant RF excitation (LIBRE) pulses.

Détails

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Etat: Public
Version: Author's accepted manuscript
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ID Serval
serval:BIB_A8C1FE5A207F
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Flexible water excitation for fat-free MRI at 3T using lipid insensitive binomial off-resonant RF excitation (LIBRE) pulses.
Périodique
Magnetic resonance in medicine
Auteur(s)
Bastiaansen JAM, Stuber M.
ISSN
1522-2594 (Electronic)
ISSN-L
0740-3194
Statut éditorial
Publié
Date de publication
06/2018
Peer-reviewed
Oui
Volume
79
Numéro
6
Pages
3007-3017
Langue
anglais
Notes
Publication types: Journal Article
Publication Status: ppublish
Résumé
To develop a robust and flexible low power water excitation pulse that enables effective fat suppression at high magnetic field strength.
A water excitation method that uses spatially non-selective pulses was optimized in numerical simulations, and implemented and tested in phantoms and healthy volunteers at 3T. The lipid insensitive binomial off-resonant excitation (LIBRE) pulse comprises two low power rectangular subpulses that have a variable frequency offset, phase offset and duration. The capability and extent of LIBRE fat suppression was quantitatively compared with conventional fat saturation (FS) and water excitation (WE) techniques.
LIBRE enables simultaneous water excitation and near complete fat suppression in large volumes at 3T as demonstrated by numerical simulations, and experiments. In phantoms and in human subjects, the frequency responses matched well with those from the numerical simulation. Comparing FS and WE, LIBRE demonstrated an improved robustness to magnetic field inhomogeneities, and a much more effectively suppressed fat signal. This applied for a range of pulse durations and pulses as short as 1.4 ms.
A flexible water excitation method was developed that shows robust, near complete fat suppression at 3T. Magn Reson Med 79:3007-3017, 2018. © 2017 International Society for Magnetic Resonance in Medicine.

Mots-clé
MRI, fat suppression, water excitation
Pubmed
Web of science
Open Access
Oui
Création de la notice
23/11/2017 19:53
Dernière modification de la notice
20/08/2019 16:13
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