Abstract #4200

Modeling the RF-induced Heating of Stents with an Analytical Model, Electro-Optic E-field Measurements and MR Thermometry

Simon Reiss¹, Lukas Haas¹, Thomas Lottner¹, Ali Özen¹, Stefan Polei², Andreas Bitzer³, and Michael Bock¹

¹Dept. of Radiology, Medical Physics, Medical Center University of Freiburg, Freiburg, Germany, ²Cortronik GmbH, Rostock-Warnemuende, Germany, ³Institute of Photonics and ICT (IPI), University of Applied Sciences FHGR, Chur, Switzerland

RF-induced currents in stents may cause substantial heating in the surrounding tissue. A precise theoretical calculation of the scattered E-fields is desirable, as heating hot spots occur near the stent surface, which often cannot be measured directly. In this study we present a theoretical model of the scattered E-field of stents and compare it to both electro-optic E-field measurements and MR thermometry. The results demonstrate that the scattered E-field patterns of stents can be precisely calculated from the theoretical model.

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