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Abstract #0570

Performance of a novel cryogen-free cryostat with an automated temperature control for fine tuning of High Temperature Superconducting RF coils: high-resolution MR imaging at 1.5 T

Isabelle Saniour1, Gilles Authelet2, Bertrand Baudouy2, Rose-Marie Dubuisson1, Laurène Jourdain1, Georges Willoquet1, Luc Darrasse1, Jean-Christophe Ginefri1, and Marie Poirier-Quinot1

1IR4M, UMR8081, Université Paris-Sud/CNRS, Université Paris-Saclay, F-91405 Orsay, France, Orsay, France, 2Irfu, CEA Paris-Saclay, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France, Gif-sur-Yvette, France

We present the performance of an MR-compatible cryogenic system dedicated to cool High Temperature Superconducting (HTS) radiofrequency coils for micro-MRI at 1.5 T. A real time control and regulation of the temperature were performed to finely tune the HTS coil to the Larmor resonance frequency with a precision of 1 Hz. Firstly, we demonstrated that this cryostat does not cause any electromagnetic disturbance. Secondly, MR images of a 1 mm-cubic liquid phantom were acquired using the HTS coil as a transceiver with a spatial resolution down to (100 μm)3 under real clinical research experimental conditions.

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