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Sensitivity of the transfer function of a helix lead on the dielectric properties of the surrounding media: A case study

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

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Citation

Kozlov, M., & Kainz, W. (2018). Sensitivity of the transfer function of a helix lead on the dielectric properties of the surrounding media: A case study. In 2017 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS). doi:10.1109/COMCAS.2017.8244818.


Cite as: https://hdl.handle.net/21.11116/0000-0001-1C4E-A
Abstract
In this case study of radio frequency (RF) induced heating of tissue near the lead tip we show how the RF-induced power deposition (P) and the lead electromagnetic model (LEM) depend on the presence of heterogeneous tissues around the lead tip. For most clinically relevant lead lengths, we observed a visible non-linear dependence of P on a small volume of a different tissue surrounding the lead tip, (e.g. a fatty pocket). Thus, using LEMs derived in a homogeneous media can result in large systematic errors in predicting P, and consequently the lead tip heating, of active implantable medical devices (AIMDs) inside the human body.