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Abstract #0727

Reconfigurable coil technology significantly reduces the SAR at the tips of bilateral deep brain simulation leads during MRI at 3T: A realistic case study of isolated leads and fully-implanted systems

Ehsan Kazemivalipour1, Ergin Atalar1, Alireza Vali2, Boris Keil3, Julie Pilitsis 4, and Laleh Golestanirad5

1Electrical and Electronics Engineering, Bilkent University, Ankara, Turkey, 2Radiology, Northwestern University, Chicago, IL, United States, 3Life Science Engineering, Institute of Medical Physics and Radiation Protection, Giessen, Germany, 4Neurosurgery, Albany Medical Center, Albany, NY, United States, 5Northwestern University, Chicago, IL, United States

We report simulation results of specific absorption rate (SAR) at tips of bilateral deep brain stimulation (DBS) implants using a recently introduced reconfigurable MRI coil technology which uses a mechanically rotating linearly polarized birdcage transmitter. Using patient-derived realistic models of DBS leads both in isolation (i.e., leads that are not yet connected to the pulse generator) and fully-implanted DBS systems with different implanted pulse generator (IPG) configurations (i.e., a single dual-channel IPG feeding both leads, or two single-channel IPGs feeding left and right leads separately), we show that the rotating coil technology significantly reduces the SAR simultaneously at left and right leads during MRI at 3T.

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