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Abstract #4084

High-Permittivity Dielectric Probes for Ultra-High Field MR Microscopy at 17.2 T

Marine A.C. Moussu1,2, Luisa Ciobanu3, Elodie Georget2, Stanislav Glybovski4, Andrew G. Webb5, Stefan Enoch1, and Redha Abdeddaim1
1Institut Fresnel, Aix Marseille Université, Marseille, France, 2Multiwave Imaging, Marseille, France, 3DRF/Joliot/Neurospin/UNIRS, Gif-sur-Yvette, France, 4ITMO University, Saint-Petersbourg, Russian Federation, 5Leiden Univ. Medical Center, Leiden, Netherlands

We propose a theoretical model predicting the Signal-to-Noise Ratio (SNR) of dielectric antennas for Magnetic Resonance Imaging. The SNR is estimated with a semi-analytical approach describing the first transverse electric mode of a high-permittivity ring resonator. When the ring is properly excited with a feeding loop, it induces a strong magnetic field in the sample while dielectric losses are limited due to low electric field intensity in this region. The proposed model is validated with numerical simulations regarding microscopy applications and its prediction confirmed experimentally at 17.2 T.

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