Using MR Thermometry to Monitor the Frozen Effect in High-Temperature Superconducting RF Coil System
Chen J, Yang H, Tsai K, Yao C, Kuo L
National Taiwan University
High-temperature superconducting RF coil (HTSC) has been proposed to have the capacity of improving the signal-to-noise ratio because of its non-resistive property. However, the thermal insulation of the liquid nitrogen dewar is usually a limitation to perform in-vivo experiments. In this work, MR thermometry using water proton resonance frequency method was used to monitor the frozen effect and the capacity of the MR thermometry in HTSC experiment was evaluated by the correlation with the absolute temperature measurement. The PRF thermal coefficient was derived as 0.1181 rad/?C and the monitoring architecture can be implemented in the future to improve the quality and safety in HTSC experiments.