Yu Li1, Fangfang Tang1, Bassem Henin1, Fabio Freschi1,2, Feng Liu1, and Stuart Crozier1
1School of ITEE, The University of Queensland, Brisbane, Australia, 2Department of Energy, Politecnico di Torino, Torino, Italy
Eddy currents are inevitably
induced in the electrically conductive surroundings including the magnet
cryostat vessel, RF coil, RF shield and other peripheral metallic structures. This results in image distortion and
artefacts. In order to control eddy currents, some studies have also discussed
the issue of eddy currents on magnet cryostat vessel and RF shields. In this
work, the eddy currents on a 12 channel micro-strip RF array head coil for 7T MRI
were analysed and compared with that of a slotted, double-sided copper RF
shield. A preliminary approach is proposed to reduce the eddy current effect,
without compromising RF performance.
