Three-dimensional echo planar imaging with controlled aliasing: A sequence for high temporal resolution functional MRI.

Détails

ID Serval
serval:BIB_460122B422BF
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Three-dimensional echo planar imaging with controlled aliasing: A sequence for high temporal resolution functional MRI.
Périodique
Magnetic resonance in medicine
Auteur⸱e⸱s
Narsude M., Gallichan D., van der Zwaag W., Gruetter R., Marques J.P.
ISSN
1522-2594 (Electronic)
ISSN-L
0740-3194
Statut éditorial
Publié
Date de publication
06/2016
Peer-reviewed
Oui
Volume
75
Numéro
6
Pages
2350-2361
Langue
anglais
Notes
Publication types: Journal Article
Publication Status: ppublish
Résumé
In this work, we combine three-dimensional echo planar imaging (3D-EPI) with controlled aliasing to substantially increase temporal resolution in whole-brain functional MRI (fMRI) while minimizing geometry-factor (g-factor) losses.
The study was performed on a 7 Tesla scanner equipped with a 32-channel receive coil. The proposed 3D-EPI-CAIPI sequence was evaluated for: (i) image quality, compared with a conventionally undersampled parallel imaging acquisition; (ii) temporal resolution, the ability to sample and remove physiological signal fluctuations from the fMRI signal of interest and (iii) the ability to distinguish small changes in hemodynamic responses in an event-related fMRI experiment.
Whole-brain fMRI data with a voxel size of 2 × 2 × 2 mm(3) and temporal resolution of 371 ms could be acquired with acceptable image quality. Ten-fold parallel imaging accelerated 3D-EPI-CAIPI data were shown to lower the maximum g-factor losses up to 62% with respect to a 10-fold accelerated 3D-EPI dataset. FMRI with 400 ms temporal resolution allowed the detection of time-to-peak variations in functional responses due to multisensory facilitation in temporal, occipital and frontal cortices.
3D-EPI-CAIPI allows increased temporal resolution that enables better characterization of physiological noise, thus improving sensitivity to signal changes of interest. Furthermore, subtle changes in hemodynamic response dynamics can be studied in shorter scan times by avoiding the need for jittering. Magn Reson Med 75:2350-2361, 2016. © 2015 Wiley Periodicals, Inc.

Mots-clé
Adult, Algorithms, Brain/diagnostic imaging, Female, Humans, Imaging, Three-Dimensional/methods, Magnetic Resonance Imaging/methods, Male, Neuroimaging/methods, 3D EPI, CAIPIRINHA, controlled aliasing, functional MRI, parallel imaging, physiological noise
Pubmed
Web of science
Création de la notice
30/07/2015 15:56
Dernière modification de la notice
20/08/2019 13:51
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