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