In-Tsang Lin1, Hong-Chang Yang2,
Jyh-Horng Chen1
1Interdisciplinary MRI/MRS Lab,
Department of Electrical Engineering, Graduate Institute of Biomedical
Electronics and Bioinformatics, Taiper, 106, Taiwan; 2Department
of Physics, National Taiwan University, Taipei 106, Taiwan
High-temperature
superconducting (HTS) radio-frequency (RF) coil has been proposed as a
promising tool for MR microscopy due to its zero-resistance characteristic
for the MR probe design. However, the cryogenic system is very difficult to
design due to its thermal insulation demands. In this study, we have
succeeded to design a longitudinal dewar that can keep animal body
temperature for more than three hours. A 40 mm in diameter Bi2Sr2Ca2Cu3Ox
(Bi-2223) tape HTS RF coil with this dewar was demonstrated. The signal to
noise gain is 3.79 compared to the copper coil with the same geometry at room
temperature.