Abstract #4093

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

Marc Dubois^1,2, 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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