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Abstract #2704

Reducing the screening during transmission using non-linear properties of high sensitivity superconductor radiofrequency coils for magnetic resonance micro imaging

Michel Geahel1,2,3, Ludovic de Rochefort2,4, Jean-Christophe Ginefri2, Luc Darrasse2, Cornelis Jacominus van der Beek3, Javier Briatico1, and Marie Poirier-Quinot2

1Unité Mixte de Physique, CNRS, Thales, Univ. Paris-Sud, Université Paris-Saclay, Palaiseau, France, 2Laboratoire d’Imagerie par Résonance Magnétique Médicale et Multi-Modalités (IR4M), UMR8081, CNRS, Université Paris-Sud, Université Paris Saclay, Orsay, France, 3Laboratoire des Solides Irradiés, CNRS UMR 7642 & CEA/DSM/IRAMIS, Ecole Polytechnique, Palaiseau, France, 4Aix-Marseille Univ, CNRS, CRMBM UMR 7339, Marseille, France

In MRI, high-temperature superconducting (HTS) radio frequency (RF) coils have been shown to greatly improve the signal-to-noise ratio. The nonlinear behavior of superconducting materials as a function of the emitted RF power is, nowadays, one of the principal technological obstacle limiting the use of these materials on a wider scale. It could be overcome by using HTS coil in reception mode only. Here we characterize these non-linear properties and use them to decouple the HTS coil during transmit mode. This preliminary study is a promising approach to use the highly sensitive HTS coils in reception mode only.

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