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Abstract #1463

B1 shimming for cervical spine 7T parallel transmission MRI: preliminary in vivo imaging and preparation of virtual observation points

Aurelien Destruel1,2,3, Pierre Jomin4, Tobias Wichmann5, Maxime Guye1,2, Redha Abdeddaim 4, and Virginie Callot1,2,3
1Aix-Marseille Université, CNRS, CRMBM, Marseille, France, 2AP-HM, Hôpital de la Timone, Pôle d'imagerie médicale, CEMEREM, Marseille, France, 3iLab-Spine - Laboratoire international associé - Imagerie et Biomécanique du rachis, Canada/, France, 4Aix Marseille Univ, CNRS, Centrale Marseille, Institut Fresnel, Marseille, France, 5RAPID Biomedical GmbH, Rimpar, Germany


Parallel transmission for 7T MRI of the spinal cord is a promising area of research, as high specific absorption rate and coil inefficiency in some levels may limit certain applications. In the absence of virtual observation points (VOP) provided by the coil manufacturer, preliminary testing and first in vivo applications on a healthy volunteer were done in a conservative SAR-restricted, showing potential in regions that suffered from signal drops with the default shim parameters. The workflow to ensure radiofrequency safety with virtual observation points, based on simulations of the specific absorption rate and their validation, is also described.

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