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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