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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