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Abstract #2633

Parallel Transmission for Heating Reduction in Realistic Deep Brain Stimulation Lead Trajectories

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

Implanted devices for deep brain stimulation (DBS) create a safety concern during MRI due to heating at exposed tip of the lead. Parallel transmit (pTx) can potentially reduce heating of the lead tip when radiofrequency (RF) inputs are selected by an appropriate numerical optimization method. To date, however, this method has not considered how the trajectory of DBS leads affects heat deposition. The present work investigates the optimized pTx method for realistic DBS lead trajectories estimated from intra-operative computed tomography (CT) scans of nine patients, with simulations indicating statistically significant reduction in heating at lead tips while maintaining reasonable B1+-field homogeneity.

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