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Abstract #0304

From Real-Time SAR Assessment to Temperature Distributions in Coronary Stents at 7T

Lukas Winter 1 , Eva Oberacker 1 , Celal zerdem 1 , Yiyi Ji 1 , Florian von Knobelsdorff-Brenkenhoff 1,2 , Gerd Weidemann 3 , Bernd Ittermann 3 , Frank Seifert 3 , and Thoralf Niendorf 1,2

1 Berlin Ultrahigh Field Facility (B.U.F.F.), Max-Delbrck Center for Molecular Medicine, Berlin, Germany, 2 Experimental and Clinical Research Center (ECRC), a joint cooperation between the Charit and the Max-Delbrueck Center for Molecular Medicine, Berlin, Germany, 3 Physikalisch Technische Bundesanstalt (PTB), Braunschweig and Berlin, Germany

En route to broader clinical UHF-CMR studies it is essential to gain a better insight into the interaction of coronary stents with radiofrequency fields. Previous explorations into the assessment of SAR and temperature levels are valuable but constrained to the very specific experimental setup used. Recognizing the need for a universal SAR estimation of passive conducting implants, this work links SAR derived from a real-time SAR estimation to actual temperature behavior. To meet this goal, numerical thermal simulations, E-field measurements and RF heating experiments are performed in coronary stents.

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