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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