Building a computational model of a transmit body coil: considerations for RF safety.
Elena Lucano 1 , Gonzalo Mendoza 1 , Tom Lloyd 2 , Steve Wedan 2 , Wolfgang Kainz 1 , and Leonardo Angelone 1
Office of Science and Engineering
Laboratories, Division of Physics, US Food and Drug
Administration, Center for Devices and Radiological
Health, Silver Spring, MD, United States,
Medical Systems, Burnsville, MN, United States
Numerical models have been used to evaluate the
potential for radiofrequency induced heating of medical
devices in a MR environment. The aim of this study was
to evaluate three model designs with respect to their
accuracy in simulating the electromagnetic field
generated by a body coil. The experimental validation
showed that all three of the numerical models properly
simulated the magnetic field distribution. However, to
represent the true electric field and avoid possible
overestimation by several orders of magnitude, accurate
modeling of the tuning capacitors, coil losses, and
source configuration was required.
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