DocumentCode :
1412576
Title :
Signal-to-Noise Ratio Improvement by Bi-2223 Surface RF Coil in 0.3T MRI System
Author :
Li, Ye ; Guo, Yan ; Jiang, Xiaohua
Author_Institution :
Dept. of Electr. Eng., Tsinghua Univ., Beijing, China
Volume :
20
Issue :
3
fYear :
2010
fDate :
6/1/2010 12:00:00 AM
Firstpage :
818
Lastpage :
821
Abstract :
A Bi-2223 surface RF coil was developed for a 0.3T permanent MRI system to achieve better signal-to-noise ratio (SNR) of images. Based on the finite element method (FEM), the SNR of a copper-made surface coil is analyzed, and the emphasis is put on the coil self-resistance that accounts for much higher percentage of the equivalent noise resistance in low field MRI than that in high field MRI. In order to improve SNR, a surface coil that is made of a Bi-2223 tape is fabricated for a 0.3T permanent MRI system. Phantom images are acquired, and the image SNR by the Bi-2223 coil in liquid nitrogen is improved by up to 35% compared with that by a copper coil at room temperature.
Keywords :
bismuth compounds; finite element analysis; high-temperature superconductors; magnetic resonance imaging; phantoms; strontium compounds; superconducting coils; superconducting magnets; superconducting tapes; Bi-2223 surface RF coil; Bi-2223 tape; Bi2Sr2Ca2Cu3O10; SNR; coil self-resistance; copper-made surface coil; equivalent noise resistance; finite element method; high field MRI; low field MRI; magnetic flux density 0.3 T; permanent MRI system; phantom images; signal-to-noise ratio improvement; Finite element method; HTS RF coil; MRI; signal-to-noise ratio;
fLanguage :
English
Journal_Title :
Applied Superconductivity, IEEE Transactions on
Publisher :
ieee
ISSN :
1051-8223
Type :
jour
DOI :
10.1109/TASC.2009.2039014
Filename :
5409518
Link To Document :
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