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Abstract #0566

An 8Tx dipoles/32Rx loop coil array – Evaluation of fMRI performances in auditory cortices at 7T

Jérémie Daniel Clément1, Sandra Da Costa2, Rolf Gruetter1,3,4, and Özlem Ipek2,5

1LIFMET, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland, 2CIBM-AIT, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland, 3Department of Radiology, Université de Lausanne, Lausanne, Switzerland, 4Department of Radiology, Université de Genève, Genève, Switzerland, 5Department of Biomedical Engineering, King's College London, London, United Kingdom

The performances of a 32-channel receive coil array combined with a tight-fitted whole-brain dipole coil array were investigated. Functional MRI data targeting the auditory cortices was acquired. Noise correlation matrices, SNR and g-factor maps were measured. Compared to a commercial 32Rx, the in-house built 8T/32Rx coil array demonstrated higher robustness in the fMRI results. Lower noise correlation coefficients were measured with the in-house built 8Tx/32Rx coil array while the overall experimentally measured SNR and g-factor maps were comparable.

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