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Influence of a metallic shield on RF-induced heating of a lead with straight and helical wires

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Kozlov,  Mikhail
Department Neurophysics (Weiskopf), MPI for Human Cognitive and Brain Sciences, Max Planck Society;

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Kozlov, M., Kainz, W., & Daniel, L. (2019). Influence of a metallic shield on RF-induced heating of a lead with straight and helical wires. In Proceedings of IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO) 2019. doi:10.1109/NEMO.2019.8853734.


Cite as: http://hdl.handle.net/21.11116/0000-0004-D228-2
Abstract
We present results including a lead electromagnetic model (LEM), power deposition, and RF-induced heating for a set of single electrode leads with straight and helical wires, as regular unshielded lead, and leads with a metallic shield. Our results were obtained numerically, employing 3D electromagnetic and thermal co-simulations at 128 MHz. We observe that the metallic shield raises the LEM calibration factor and thereby it increases the RF-induced heating of the lead with helical wires, a circumstance that previously had mostly been neglected.