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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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