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Abstract #5509

Voxel Based Transmit Gain Calibration using Bloch-Siegert semi-LASER at 7T

Ralph Noeske1, Alessandra Toncelli2, Hana Hlavata3, and Michela Tosetti3,4

1GE Healthcare, Berlin, Germany, 2INFN and Department of Physics, University of Pisa, Pisa, Italy, 3IMAGO7 Foundation, Pisa, Italy, 4IRCCS Stella Maris, Pisa, Italy

A voxel-based implementation of the Bloch-Siegert phase shift method within a semi-LASER based localization sequence that shows a high robustness to determine transmit gain (TG) for the same volume that is excited for the spectroscopy experiment is demonstrated at 7T. Phantom and in-vivo measurements show higher robustness over a large range of initial TG settings and voxel locations resulting in a faster and more reliable calibration procedure to achieve good voxel selection and spectrum quality and avoid additional calibration steps.

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