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Abstract #4179

Effects of Respiration on B1+ and SAR in Whole-Body Imaging at 7 Tesla

Emma Doran1, Stephen Bawden1, Paul Glover1, Susan Francis1, Richard Bowtell1, and Penny A. Gowland1

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

The work aimed to quantify the effect of the phase of respiration on calculated local SAR and B1+ excitation fields using electromagnetic simulations using XFDTD software and to verify these results by comparing with B1+ maps acquired in vivo. The results show that the variation in local SAR was greater for the anterior elements due to the movement of the chest between inhale and exhale breath holds. The change in B1+ in the abdominal organs and in regions of interest under each transmit element was not significant.

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