A connectome-based comparison of diffusion MRI schemes.

Détails

Ressource 1Télécharger: BIB_EF4BC92DECC4.P001.pdf (5971.64 [Ko])
Etat: Public
Version: Final published version
Licence: Non spécifiée
ID Serval
serval:BIB_EF4BC92DECC4
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
A connectome-based comparison of diffusion MRI schemes.
Périodique
Plos One
Auteur⸱e⸱s
Gigandet X., Griffa A., Kober T., Daducci A., Gilbert G., Connelly A., Hagmann P., Meuli R., Thiran J.P., Krueger G.
ISSN
1932-6203 (Electronic)
ISSN-L
1932-6203
Statut éditorial
Publié
Date de publication
2013
Peer-reviewed
Oui
Volume
8
Numéro
9
Pages
e75061
Langue
anglais
Notes
Publication types: Journal Article
Résumé
Diffusion MRI has evolved towards an important clinical diagnostic and research tool. Though clinical routine is using mainly diffusion weighted and tensor imaging approaches, Q-ball imaging and diffusion spectrum imaging techniques have become more widely available. They are frequently used in research-oriented investigations in particular those aiming at measuring brain network connectivity. In this work, we aim at assessing the dependency of connectivity measurements on various diffusion encoding schemes in combination with appropriate data modeling. We process and compare the structural connection matrices computed from several diffusion encoding schemes, including diffusion tensor imaging, q-ball imaging and high angular resolution schemes, such as diffusion spectrum imaging with a publically available processing pipeline for data reconstruction, tracking and visualization of diffusion MR imaging. The results indicate that the high angular resolution schemes maximize the number of obtained connections when applying identical processing strategies to the different diffusion schemes. Compared to the conventional diffusion tensor imaging, the added connectivity is mainly found for pathways in the 50-100mm range, corresponding to neighboring association fibers and long-range associative, striatal and commissural fiber pathways. The analysis of the major associative fiber tracts of the brain reveals striking differences between the applied diffusion schemes. More complex data modeling techniques (beyond tensor model) are recommended 1) if the tracts of interest run through large fiber crossings such as the centrum semi-ovale, or 2) if non-dominant fiber populations, e.g. the neighboring association fibers are the subject of investigation. An important finding of the study is that since the ground truth sensitivity and specificity is not known, the comparability between results arising from different strategies in data reconstruction and/or tracking becomes implausible to understand.
Pubmed
Web of science
Open Access
Oui
Création de la notice
22/10/2013 9:03
Dernière modification de la notice
14/07/2023 5:54
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