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Abstract #3897

Safe Deep Brain Stimulator MR Imaging Experiments Using Fiber Optic Current Monitoring Feedback System

Haydar Celik1,2, Namik Sengezer3, Burak Akin2, Dogac Mehmet Gulnerman3, Burcu Cingoz Insal4, Can Kerse, 23, Ergin Atalar, 23

1Electrical and Electronics Engineering, Bilkent University , Ankara, Turkey; 2National Magnetic Resonance Research Center (UMRAM), Ankara, Turkey; 3Electrical and Electronics Engineering, Bilkent University, Ankara, Turkey; 4Moleculer Biology and Genetics, Bilkent University, Ankara, Turkey

MRI has been used to image deep brain stimulator (DBS) lead and fMRI studies have been conducted in order to understand stimulation profiles of the electrodes. Both placement and functionality of the lead are vital. However, DBS leads may cause severe results because of the RF and gradient fields. Previously, a fiber optic signal transmission system was presented by authors. In this study, an important extension is proposed in order to maximize safety profile of the system. Proposed feedback mechanism enables monitoring of the induced current to the brain. Any rise or fall of the current is a possible reason of changing conductivity due to RF heating. Therefore, monitoring this quantity provides opportunity for better safety profile. In this study, in-vivo and in-vitro safety experiments have been conducted.