Harmonic analysis of spherical sampling in diffusion MRI

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ID Serval
serval:BIB_2C842168137E
Type
Actes de conférence (partie): contribution originale à la littérature scientifique, publiée à l'occasion de conférences scientifiques, dans un ouvrage de compte-rendu (proceedings), ou dans l'édition spéciale d'un journal reconnu (conference proceedings).
Sous-type
Abstract (résumé de présentation): article court qui reprend les éléments essentiels présentés à l'occasion d'une conférence scientifique dans un poster ou lors d'une intervention orale.
Collection
Publications
Titre
Harmonic analysis of spherical sampling in diffusion MRI
Titre de la conférence
ISMRM 2011, 19th Annual Meeting of the International Society for Magnetic Resonance in Medicine
Auteur(s)
Daducci A., McEwen J., Van De Ville D., Thiran J.P., Wiaux Y.
Adresse
Montreal, Quebec, Canada, May 7-13, 2011
ISBN
1524-6965
Statut éditorial
Publié
Date de publication
2011
Volume
19
Série
Proceedings of the International Society for Magnetic Resonance in Medicine
Pages
3929
Langue
anglais
Résumé
In the last decade diffusion MRI has become a powerful
tool to non-invasively study white-matter integrity in
the brain. Recently many research groups have focused
their attention on multi-shell spherical acquisitions
with the aim of effectively mapping the diffusion signal
with a lower number of q-space samples, hence enabling a
crucial reduction of acquisition time. One of the
quantities commonly studied in this context is the
so-called orientation distribution function (ODF). In
this setting, the spherical harmonic (SH) transform has
gained a great deal of popularity thanks to its ability
to perform convolution operations efficiently and
accurately, such as the Funk-Radon transform notably
required for ODF computation from q-space data. However,
if the q-space signal is described with an unsuitable
angular resolution at any b-value probed, aliasing (or
interpolation) artifacts are unavoidably created. So far
this aspect has been tackled empirically and, to our
knowledge, no study has addressed this problem in a
quantitative approach. The aim of the present work is to
study more theoretically the efficiency of multi-shell
spherical sampling in diffusion MRI, in order to gain
understanding in HYDI-like approaches, possibly paving
the way to further optimization strategies.
Mots-clé
Diffusion MRI, Sampling Scheme, Fourier, LTS5, CIBM-SPC
Création de la notice
07/01/2014 9:11
Dernière modification de la notice
03/03/2018 15:27
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