A compact SQUID-detected magnetic resonance imaging system under microtesla field in a magnetically unshielded environment

Hsin Hsien Chen; Hong Chang Yang; Herng Er Horng; Shu Hsien Liao; Shieh Yueh; Li Min Wang

doi:10.1063/1.3656984

A compact SQUID-detected magnetic resonance imaging system under microtesla field in a magnetically unshielded environment

Hsin Hsien Chen, Hong Chang Yang, Herng Er Horng, Shu Hsien Liao, Shieh Yueh, Li Min Wang

光電科技研究所

研究成果: 雜誌貢獻 › 文章

11 引文斯高帕斯（Scopus）

摘要

In this study, we present a compact and sensitive SQUID-detected nuclear magnetic resonance spectrometer and imager (NMR/MRI) using flux coupling in microtesla fields. The pre-polarization coil, measuring coil, pulsed coil, and gradient coils were set up inside a three-layer aluminum box while the SQUID-detector was shielded with a high-T_c superconducting vessel. A compensation field was applied to improve the field homogeneity in magnetically unshielded environments. The spin precession of protons was inductively coupled to the SQUID magnetometer via a resonant flux transformer. We obtained a signal-to-noise ratio of 120 in one measurement, a spectral resolution better than 1 Hz, and a spatial resolution of 1.3 mm in the images.

原文	英語
文章編號	093903
期刊	Journal of Applied Physics
卷	110
發行號	9
DOIs	https://doi.org/10.1063/1.3656984
出版狀態	已發佈 - 2011 十一月 1

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1063/1.3656984

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Chen, H. H., Yang, H. C., Horng, H. E., Liao, S. H., Yueh, S., & Wang, L. M. (2011). A compact SQUID-detected magnetic resonance imaging system under microtesla field in a magnetically unshielded environment. Journal of Applied Physics, 110(9), [093903]. https://doi.org/10.1063/1.3656984

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