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Abstract #5204

RF slice shimming at 7T with power control on a commercial 8-channel transmit coil

Christopher J. Mirfin1, Stephen Bawden1, Paul Glover1, Penny A. Gowland1, and Richard Bowtell1

1Sir Peter Mansfield Imaging Centre, University of Nottingham, Nottingham, United Kingdom

We investigate the performance that can be achieved by applying volume and slice shimming on the commonly-used Nova 8-channel transmit/32-channel receive head coil, whilst controlling the total transmit power, as a proxy for global SAR. Under this constraint, our results suggest that shimming on individual axial slices can significantly improve the achievable B1 field uniformity (39.0% ± 3.9%) for the same transmit power as normal quadrature mode.

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