Abstract #0484

Variation of RF heating around deep brain stimulation leads during 3.0 T MRI in fourteen patient-derived realistic lead models: The role of extracranial lead management

Laleh Golestanirad¹, Julie Pilitsis², Alastair Martin³, Paul Larson⁴, Boris Keil⁵, Giorgio Bonmassar⁶, and Lawrence L Wald⁷

¹Radiology, Massachusetts General Hospital, Brookline, MA, United States, ²Neurosurgery, Albany Medical Center, ³Radiology, UCSF School of Medicine, ⁴Neurological Surgery, University of California San Francisco, ⁵Life Science Engineering, Institute of Medical Physics and Radiation Protection, Mittelhessen University of Applied Sciences (THM), ⁶Radiology, Massachusetts General Hospital, ⁷Massachusetts General Hospital, Charlestown, MA, United States

Post-operative MRI of patients with deep brain stimulation (DBS) implants is useful to assess complications and diagnose comorbidities. More than one third of medical centers, however, do not perform MRI on this patient population due to safety risks. Almost nothing is known about the variation and extent of RF heating of DBS leads during MRI at higher fields (>1.5 T) in a real patient population. Here we report the results of SAR calculations around DBS leads in a cohort of fourteen realistic DBS lead geometries. We also present preliminary results of applying an intra-operative lead management technique to reduce SAR during 3.0 T MRI.

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