Abstract #0482

Low Heating B1 Mapping in Parallel Transmit for Deep Brain Stimulators

Clare McElcheran¹, Laleh Golestanirad², Maria Iacono³, Benson Yang⁴, Kevan Anderson⁵, Giorgio Bonmassar², and Simon Graham⁴

¹University of Toronto, Toronto, ON, Canada, ²Massachusetts General Hospital, MA, United States, ³US Food and Drug Administration, Silver Spring, MD, United States, ⁴Sunnybrook Health Sciences Centre, ON, Canada, ⁵Innovere Medical, ON, Canada

Deep brain stimulators and other elongated implants interact with the RF transmission fields used in MRI, potentially causing unsafe levels of localized tissue heating. It may be possible to suppress these heating effects using parallel RF transmission (pTx) methods, but a practical approach still remains to be implemented. Toward this goal, we present a method that combines intra-operative computed tomography (CT) data, electromagnetic simulations, and low-SAR B₁-mapping to determine pTx input parameters for suppressing heating effects in DBS patients.

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