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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