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Abstract #4165

Effect of helix wire geometry and insulator electrical properties on RF-induced temperature rise and the lead electromagnetic model: a case study

Mikhail Kozlov1 and Wolfgang Kainz2

1Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig, Germany, 2U.S. FDA, CDRH, Office of Science and Engineering Laboratories, Division of Biomedical Physics, Silver Spring, MD, United States

This case study we investigated RF-induced heating of different helix leads at 127.7 MHz obtained with the lead electromagnetic model (LEM) and direct 3D electromagnetic and thermal co-simulations. A large set of incident electric fields was generated in a phantom by an array of four antennas with varying spatial positions and sources. LEM was validated for predicting temperature in close proximity to the end face of lead tip. However the variance of the fitted values and observed values was rather high for the integral of the power deposition calculated over volume surrounded the lead tip.

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