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Abstract #0415

Open-bore vertical MRI scanners generate significantly lower RF heating around DBS implants: A Simulation study with experimental validation

Bhumi Bhusal1, Ehsan Kazemivalipour2, Jasmine Vu1, Stella LIn1, Bach Thanh Nguyen1, John Kirsch3, Elizabeth Nowac4, Julie Pilitsis5, Joshua Rosenow1, Ergin Atalar2, and Laleh Golestanirad1
1Northwestern University, Chicago, IL, United States, 2Bilkent University, Ankara, Turkey, 3Massachusetts General Hospital, Charlestown, MA, United States, 4Illinois Bone and Joint Institute, Wilmette, IL, United States, 5Albany Medical College, Albany, NY, United States

Though there are many studies reporting RF heating of implants in horizontal MRI scanners, there is almost no literature on vertical scanners that have 90° rotated transmit coils and a fundamentally different distribution of RF fields. Here we evaluate RF heating of deep brain stimulation (DBS) implants during MRI in a 1.2T open-bore vertical scanner compared to a 1.5T horizontal system with both numerical simulations and experimental measurements. We found a significant reduction in RF heating using vertical vs horizontal RF coils which are attributable to the orthogonal orientation of RF electric fields.

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