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Abstract #3174

Preliminary investigation on shielding-ring based decoupling technique for small monolithic RF coils

Zhoujian Li 1 , Roberta Kriegl 2,3 , Elmar Laistler 2,3 , Marie Poirier-Quinot 1 , Luc Darrasse 1 , and Jean-Christophe Ginefri 1

1 Laboratoire dImagerie par Rsonance Magntique Mdicale et Multi-Modalits (IR4M), UMR8081 CNRS, Universit Paris-Sud, Orsay, France, 2 Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, Vienna, Austria, 3 MR Centre of Excellence, Medical University of Vienna, Vienna, Austria

A shielding ring based decoupling technique was investigated for small monolithic HTS coils, an analytical model based on magnetic flux compensation to determine the geometric configuration of two neighbor shielding rings to achieve optimal decoupling was developed and validated experimentally using a two-MTLR copper array, and the effect of the shielding rings on the overall coil losses was evaluated using a standard 2-coil array cooled at LN2 temperature. Results show that configuration achieving near-optimal decoupling can be obtained using this model, and high Q-factor value by employing HTS material can be expected by exploiting this technique.

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