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Abstract #3691

Simultaneous multi-slice imaging reduces sensitivity of local-SAR to patient motion at 7T

Emre Kopanoglu1, Cem M. Deniz2, and Richard G. Wise1,3
1CUBRIC, School of Psychology, Cardiff University, Cardiff, United Kingdom, 2Department of Radiology, New York University Langone Health, New York, NY, United States, 3Institute for Advanced Biomedical Technologies, University of Chieti-Pescara, Chieti, Italy

This study investigates the effect of within-scan patient motion on local-SAR for simultaneous multi-slice (SMS) imaging at 7T. A virtual body model was simulated at 104 different positions. 1-/2-/3-spokes pulses were designed to excite a region of 60 slices covering the cerebellum and the brain, using SMS-factors of 1 through 5. Local-SAR was observed to increase by up to 2.75-fold due to patient motion. Pulses with higher SMS-factors were up to 50% less sensitive against changes in local-SAR due to patient motion, compared to SMS:1 pulses. Pulses with higher SMS-factors yielded more consistent local-SAR throughout the scan.

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