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Abstract #4192

On the RF Excitation of Overlapping Stents: Electro-optical E-field Measurements

Simon Reiss1, Thomas Lottner1, Ali Özen1, Michael Bock1, and Andreas Bitzer2

1Department of Radiology, Medical Physics, Medical Center University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany, 2Institute of Photonics and ICT (IPI), University of Applied Sciences HTW Chur, Chur, Switzerland

In stents, RF-induced heating is mainly associated with the antenna effect that occurs due to the thin and elongated geometry. Heating occurs mainly at the stent tip where a dipole-like E-field pattern is present. However, the E-field pattern and thus the locations of maximum heating change when two stents overlap. Using an optical setup for high-resolution E-field mapping, we provide further insight in the RF excitation of various combinations of stents in different geometric and dielectric configurations.

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