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Abstract #0854

Multi-Turn Multi-Gap Transmission Line Resonators - First Tests at 7 T

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

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

A novel design scheme for monolithic transmission line resonators (TLRs) used as NMR surface probes is presented. The multi-turn multi-gap TLR design provides an additional degree of freedom for adjusting the TLR geometry, and therefore enables more accurate optimization of current distribution, and B 1 pattern. It also promotes the use of multi-turn TLR technology for high-field applications requiring a large FOV, which has not been possible up to now due to the low self-resonance frequency of these coils. Here, we compare three different multi-turn multi-gap TLRs designed for 1 H imaging at 7 T by 3D electromagnetic simulations and MRI experiments.

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