고온초전도 선재와 정합회로를 이용한 RF coil 제작에 대한 기초연구
Study on fabricated RF coil using high-temperature superconductor tape and matching circuit for low field MRI system
- Resource Type
- Article
Text
- Authors
- 김동혁; 고락길; 강부민; 하동우; 손명환; 문치웅; D.H. Kim; R.K. Ko; B.M. Kang; D.W. Ha; M.H. Sohn; C.W. Mun
- Source
- 한국초전도·저온논문지 (구 한국초전도저온공학회논문지), 03/30/2012, Vol. 14, Issue 1, p. 44-47
- Subject
- high-temperature uperconducting(HTS)
Bi-2223 tape
signal-to-noise ratio
RF coil
MRI
- Language
- Korean
- ISSN
- 1229-3008
The substantial improvement of the signal-to-noise ratio (SNR) can be achieved with small-size samples or low-field MRI system by high-temperature superconducting(HTS) RF coil. The typical HTS RF coil made of HTS thin film is expensive and is limited the coil geometry to planar surface coil. In this study, commercial Bi-2223 HTS tapes was used as RF coil for a 0.35T permanent MRI system. It has advantages of both much lower cost and easier fabrication over HTS thin film coil. SNR gain of the image obtained from the HTS RF coil over a conventional Cu RF coil at room temperature was about 2.4-fold and 1.9-fold using the spin echo pulse sequence and gradient echo pulse sequence respectively.