Abstract #0565

Flexible multi-turn multi-gap coaxial RF coils (MTMG-CCs): design concept and bench validation

Lena Nohava^1,2, Raphaela Czerny², Michael Obermann², Michael Pichler², Roberta Frass-Kriegl², Jacques Felblinger³, Jean-Christophe Ginefri¹, and Elmar Laistler²

¹IR4M (Imagerie par Résonance Magnétique et Multi-Modalités), UMR 8081, Université Paris-Sud/CNRS, Université Paris-Saclay, Orsay, France, ²Division MR Physics, Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, Vienna, Austria, ³Université de Lorraine, Inserm, IADI, Nancy, France

The design of flexible coaxial coils (CCs) based on the single-turn single-gap concept is extended by multiple turns and multiple gaps (MTMG-CCs) to achieve a larger range of coil diameters for a given resonance frequency. An equivalent circuit for MTMG-CCs is presented and the resonance condition is solved numerically for coils with diameters up to 20 cm, 1-3 turns, and 1-3 gaps. For validation of the calculations, 27 coils with 6/9/12 cm diameters, 1-3 turns, and 1-3 gaps were built and characterized on the bench.

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