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Abstract #2813

Safety of 4-channel parallel RF transmission MRI at 3 T: Effects of system uncertainty and system failure pertinent to deep brain stimulation

Benson Yang1,2, Chih-Hung Chen2, and Simon J Graham1,3
1Physical Sciences, Sunnybrook Research Institute, Toronto, ON, Canada, 2Electrical and Computer Engineering, McMaster University, Hamilton, ON, Canada, 3Medical Biophysics, University of Toronto, Toronto, ON, Canada


Parallel radiofrequency transmission (pTx) technology continues to demonstrate its potential at addressing MRI safety concerns relating to patients with implanted deep brain stimulation devices. One promising technique involves electromagnetic simulation that determine optimized pTx inputs to generate a safe mode of imaging surrounding the implanted device. However, in practice, instrumentation uncertainty can impact the ability of the pTx system to accurately produce the desired signals. The present work studied the safety implications of system uncertainty and system failure in a 4-channel pTx platform. The preliminary results showed that in a worst-case scenario, temperature elevations that exceed MRI guidelines are possible.

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