Journal Articles Journal of Magnetic Resonance Year : 2017

Stacked magnetic resonators for MRI RF coils decoupling

Alexandre Vignaud
Alexis Amadon
Franck Mauconduit
Stefan Enoch
Gérard Tayeb
Nicolas Bonod

Abstract

Parallel transmission is a very promising method to tackle B 1 + field inhomogeneities at ultrahigh field in magnetic resonant imaging (MRI). This technique is however limited by the mutual coupling between the radiating elements. Here we propose to solve this problem by designing a passive magneto-electric resonator that we here refer to as stacked magnetic resonator (SMR). By combining numerical and experimental methodologies, we prove that this passive solution allows an efficient decoupling of active elements of a phased-array coil. We demonstrate the ability of this technique to significantly reduce by more than 10 dB the coupling preserving the quality of images compared to ideally isolated linear resonators on a spherical salty agar gel phantom in a 7 T MRI scanner.

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hal-01571588 , version 1 (19-07-2018)

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Elodie Georget, Michel Luong, Alexandre Vignaud, Eric Giacomini, Edouard Chazel, et al.. Stacked magnetic resonators for MRI RF coils decoupling. Journal of Magnetic Resonance, 2017, 275, pp.11-18. ⟨10.1016/j.jmr.2016.11.012⟩. ⟨hal-01571588⟩
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