Abstract #2176

Analysis of Eddy Currents for High Field RF Coil Design

Yu Li¹, Fangfang Tang¹, Bassem Henin¹, Fabio Freschi^1,2, 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.

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