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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