Abstract #4171

1.5T and 3T MRI safety of a deep brain stimulation system: in vitro temperature measurements

Annie Papadaki^1,2, Hassan B Hawsawi^3,4, Ali Rajabian@nhs.net⁵, Louis Lemieux³, Ludvic Zrinzo⁵, and John S Thornton^1,2

¹Lysholm Department of Neuroradiology, UCLH, London, United Kingdom, ²UCL Institute of Neurology, :ondon, United Kingdom, ³Department of Clinical and Experimental Epilepsy, UCL Institute of Neurology, :ondon, United Kingdom, ⁴Administration of Medical Physics, King Abdullah Medical City (KAMC), Makkah, Saudi Arabia, ⁵Unit of Functional Neurosurgery, Sobell Department of Motor Neuroscience and Movement Disorders, UCL Institute of Neurology, London, United Kingdom

The aim of this study was to compare RF-induced heating in an in vitro model of an implanted Boston Scientific Gevia DBS device between 1.5T and 3T MRI. We assessed temperature changes in a phantom simulating a patient with a bilateral DBS neuromodulation device in different transmit coils, lead configurations and 3T B1 shimming options. Highest temperature increase was recorded at the distal electrode contact during 1.5T MRI in the body transmit coil. Phantom tests showed that lead arrangement, B1 shimming and DBS system configuration can have significant effect on temperature recorded near the contacts.

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