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Abstract #1371

Transmitted Power from a Tx/Rx Birdcage Coil to Nearby Conductors in Air and in Gel

Zoltan Nagy 1,2 , Aaron Oliver-Taylor 3 , Andre Kuehne 4,5 , and Nikolaus Weiskopf 1

1 Wellcome Trust Centre for Neuroimaging, University College London, London, United Kingdom, 2 Laboratory for Social and Neural Systems Research, University of Zrich, Zrich, Switzerland, 3 Institute for Women's Health, University College London, United Kingdom, 4 Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, Austria, 5 MR Center of Excellence, Medical University of Vienna, Austria

Tx/Rx birdcage head coils are often considered safe for patients with abdominal implants but whether such practice is indeed safe has not been tested systematically. We used radio frequency B/E field probes to investigate the transmitted power through air and conductive gel by a Tx/Rx coil in a 3T scanner. We could detect significant levels of both fields at distances up to 50 cm from the Tx/Rx coil. These findings were confirmed with simulations. Preliminary heating results around straight and looped wires did not result in significant temperature elevation but this may be due to the insensitivity of the implants.

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