Thomas M. Fiedler1, Mark E. Ladd1,2, and Andreas K. Bitz1
1Medical Physics in Radiology, German Cancer Research Center (DKFZ), Heidelberg, Germany, 2Erwin L. Hahn Institute for Magnetic Resonance Imaging, University Duisburg-Essen, Essen, Germany
It has been shown that
specific configurations of high-permittivity pads can lead to an increase of
local SAR. So far, the effects of high-permittivity pads on RF fields have been
investigated only for 1H imaging at 7 Tesla. For X-nuclei imaging
typically dual-tuned coils are applied. In this work, we investigate the effect
of high-permittivity pads, typically utilized to optimize RF fields for 1H
imaging, for 23Na imaging at 7T. RF simulations were performed for
two body models to determine under which conditions SAR elevations are likely
to occur or can be avoided.
