Denoising arterial spin labeling MRI using tissue partial volume

Jan Petr 1, * Jean-Christophe Ferré 1, 2 Jean-Yves Gauvrit 1, 2 Christian Barillot 1
* Auteur correspondant
1 VisAGeS - Vision, Action et Gestion d'informations en Santé
INSERM - Institut National de la Santé et de la Recherche Médicale : U746, Inria Rennes – Bretagne Atlantique , IRISA-D5 - SIGNAUX ET IMAGES NUMÉRIQUES, ROBOTIQUE
Abstract : Arterial spin labeling (ASL) is a noninvasive MRI method that uses magnetically labeled blood to measure cerebral perfusion. Spatial resolution of ASL is relatively small and as a consequence perfusion from different tissue types is mixed in each pixel. An average ratio of gray matter (GM) to white matter (WM) blood flow is 3 to 1. Disregarding the partial volume effects (PVE) can thus cause serious errors of perfusion quantification. PVE also complicates spatial filtering of ASL images as apart from noise there is a spatial signal variation due to tissue partial volume. Recently, an algorithm for correcting PVE has been published by Asllani et al. It represents the measured magnetization as a sum of different tissue magnetizations weighted by their fractional volume in a pixel. With the knowledge of the partial volume obtained from a high-resolution MRI image, it is possible to separate the individual tissue contributions by linear regression on a neighborhood of each pixel. We propose an extension of this algorithm by minimizing the total-variation of the tissue specific magnetization. This makes the algorithm more flexible to local changes in perfusion. We show that this method can be used to denoise ASL images without mixing the WM and GM signal.
Type de document :
Communication dans un congrès
SPIE Medical Imaging 2010: Image Processing, Feb 2010, San Diego, United States. 7623, pp.n.a, 2010, 〈10.1117/12.844443〉
Liste complète des métadonnées

Littérature citée [2 références]  Voir  Masquer  Télécharger

http://www.hal.inserm.fr/inserm-00601147
Contributeur : Jan Petr <>
Soumis le : jeudi 16 juin 2011 - 19:12:56
Dernière modification le : mercredi 16 mai 2018 - 11:24:04
Document(s) archivé(s) le : vendredi 9 novembre 2012 - 15:15:27

Fichier

Petr10b.pdf
Fichiers produits par l'(les) auteur(s)

Identifiants

Citation

Jan Petr, Jean-Christophe Ferré, Jean-Yves Gauvrit, Christian Barillot. Denoising arterial spin labeling MRI using tissue partial volume. SPIE Medical Imaging 2010: Image Processing, Feb 2010, San Diego, United States. 7623, pp.n.a, 2010, 〈10.1117/12.844443〉. 〈inserm-00601147〉

Partager

Métriques

Consultations de la notice

456

Téléchargements de fichiers

360