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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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