Abstract #0300

Reduction of the absorbed power around electrode tips in deep brain stimulation patients using pTx: Impact of number and arrangement of channels

Bastien Guerin^1,2, Darin Dougherty^2,3, and Lawrence L. Wald^1,2

¹Radiology, Massachusetts General Hospital, Charlestown, MA, United States, ²Harvard Medical School, Boston, MA, United States, ³Psychiatry, Massachusetts General Hospital, Charlestown, MA, United States

We assess the potential of pTx for reduction of the absorbed power around electrode tips (APAET) in DBS patients using a realistic DBS patient model and electromagnetic field co-simulation. We simulate 5 coils, including a birdcage coil driven in quadrature and as a 2-channel pTx coil as well as four pTx coils with up to 16 channels arranged in up to two rows. We compare magnitude least square pulses with explicit constraints on the APAET and global SAR. We show that pTx, especially using head-only arrays, has the potential to alleviate the safety problem of DBS patients at 3 Tesla.

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