Title :
High-Tc Superconducting receiving coils for nuclear magnetic resonance imaging
Author :
Lee, Hsu-Lei ; Lin, In-Tsang ; Chen, Jyh-Horng ; Horng, Herng-Er ; Yang, Hong-Chang
Author_Institution :
Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan
fDate :
6/1/2005 12:00:00 AM
Abstract :
Nuclear magnetic resonance (NMR) microscopy poses high demands on the sensitivity of the receiver coils. We have developed high-Tc superconducting (HTS) tape receiving coils for nuclear magnetic resonance imaging. The surface receiver coil is constructed from high-Tc Bi2Sr2Ca2Cu3Oy tape coil and cooled in liquid nitrogen temperature. The desired receiver surface coil is numerically simulated and optimized to have high value of the unloaded quality factor. With this HTS receiver coil we have obtained significant improvement in the unloaded Q-value, loaded Q-value and substantial gain in signal-to-noise ratio (SNR). The SNR improvement of 2.4 was achieved in the kiwi imaging and improvement of 2.7 in the braining imaging of rat at 300 K. The MRI microscopy is tested and compared the results with copper receiver.
Keywords :
NMR imaging; acoustic nuclear magnetic resonance; biomedical NMR; bismuth compounds; calcium compounds; copper compounds; high-temperature superconductors; lead compounds; strontium compounds; superconducting coils; superconducting tapes; Bi; HTS tape receiving coils; NMR microscopy; SNR improvement; high temperature superconducting coil; nuclear magnetic resonance imaging; receiver surface coil; signal-to-noise ratio; unloaded quality factor; Bismuth; Copper; High temperature superconductors; Magnetic force microscopy; Magnetic resonance imaging; Nitrogen; Nuclear magnetic resonance; Strontium; Superconducting coils; Superconducting films; HTS RF surface coil; magnetic resonance imaging; signal-to-noise ratio;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2005.849582
