A dedicated two-channel phased-array receiver coil for high-resolution MRI of the rat knee cartilage at 7 T.
Fiche publication
Date publication
décembre 2009
Auteurs
Membres identifiés du Cancéropôle Est :
Pr GILLET Pierre
Tous les auteurs :
Rengle A, Armenean M, Bolbos R, Goebel JC, Pinzano-Watrin A, Saint-Jalmes H, Gillet P, Beuf O
Lien Pubmed
Résumé
In the field of small animal studies, the array coil imaging has become increasingly important. In this paper, a dedicated two-channel array coil operating at 300 MHz (7 T) for high-resolution MRI (HR-MRI) of the rat knee cartilage is presented. The average gain in signal-to-noise ratio (SNR) compared to a 15-mm multipurpose surface coil was 2.2. This SNR gain was used to improve the spatial resolution of 3-D acquisitions by decreasing the voxel size from 59 x 59 x 156 microm(3) to 51 x 51 x 94 microm(3) without time penalty. Also, a set of two array coils was used to perform a simultaneous acquisition of both knee joints of a rat, maintaining the same scanning time without SNR or spatial resolution degradation compared to the single knee joint acquisition. This two-channel array coil is a key element to perform HR-MRI and extract cartilage morphological parameters such as thickness and volume.
Référence
IEEE Trans Biomed Eng. 2009 Dec;56(12):2891-7.