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Abstract #1849

Rapid SAR assessment of electrically thin implantable devices using an analytical approach: Proof-of-Principle for RF heating of coronary stents at 7.0 T

Lukas Winter 1 , Eva Oberacker 1 , Celal zerdem 1 , Yiyi Ji 1 , Florian von Knobelsdorff-Brenkenhoff 1,2 , Gerd Weidemann 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-MR studies it is essential to gain a better insight into the interaction of passive conducting implants with radiofrequency fields. The conclusions drawn from earlier studies are valuable but constrained to the very specific experimental setup used. Recognizing the need for an universal and rapid approach for SAR assessment, this work derives and validates an analytical expression for fast SAR estimation of coronary stents. Our findings can potentially be translated to any patient, coronary stent type, RF coil configuration and RF transmission regime.

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