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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