Improving Long-distance Surface Imaging Performance with a Cryogenic Coil

Motivation: The signal-to-noise ratio of high-field RF surface coils decays with distance, and we propose cryogenic coils to compensate for the SNR of MR Imaging. Goal(s): The cryogenic coil in our work aims to significantly improve the SNR of the images at long distances while guaranteeing a large imaging FOV. Approach: We design a large size RF coil and cool it down for rat imaging. Results: The experimental results show that the cryogenic coil obtained a SNR of 1.8-fold higher than a room-temperature coil and 1.1-fold higher than that of a commercial multi-channel rat coil. Impact: The designed coil can help to improve the quality of MR imaging in some scenarios where the object to be measured is far away from the RF receive coil.