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Abstract #4093

Passive RF shimming for 7T head coil with hybridized meta-atom: In vivo investigation

Marc Dubois1,2, Lisa Leroi3, Zo Raolison4, Redha Abdeddaim1, Tryfon Antonakakis4, Julien De Rosny5, Alexandre Vignaud3, Pierre Sabouroux1, Elodie Georget4, Benoit Larrat3, Gérard Tayeb1, Nicolas Bonod1, Alexis Amadon3, Franck Mauconduit3, Cyril Poupon3, Denis Le Bihan3, and Stefan Enoch1
1Institut Fresnel, Aix Marseille Université, CNRS, Marseille, France, 2CRMBM, Aix Marseille Université, CNRS, Marseille, France, 3CEA, DRF, JOLIOT, NeuroSpin, UNIRS, Gif sur Yvette, France, 4Multiwave Imaging, Marseille, France, 5ESPCI Paris, PSL Research University, CNRS, Institut Langevin, Paris, France

We show that hybridized meta-atom can be used to improve transmit homogeneity in a 7T head birdcage coil equipped with a 32-channel receive array. Our results demonstrates the enhancement of transmit signal in vivo with the possibility to fill one of the gap usually observed in the brain temporal lobes. This metamaterial based passive shimming strategy provides a cost effective, long-lasting solution without any impact on the patient’s comfort during the examination.

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