Microtesla NMR and high resolution MR imaging using high-Tc SQUIDs

Shu Hsien Liao*, Hsien Hsien Chen, Yu Shan Deng, Ming Wei Wang, K. L. Chen, C. W. Liu, C. I. Liu, Hong-Chang Yang, Herng-Er Horng, J. J. Chieh, Shieh-Yueh Yang

*此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

5 引文 斯高帕斯(Scopus)

摘要

In this work, we set up a low-cost high-T\rm c SQUID-based low-field nuclear magnetic resonance (NMR) and magnetic resonance imaging (MRI) system without \mu-metal. In order to reduce the surrounding noise, we built the shielded box and shielded cylinder made out of aluminum. For NMR and MRI measurements, we apply the gradient compensation field to cancel the field inhomogeneity in our lab to obtain a narrow linewidth NMR spectrum of 0.8 Hz from a 10-ml water specimen. In the absence of chemical shifts, the J-couplings of trimethyl phosphate and trifluoroethanol are demonstrated in trials of the proposed scheme. Furthermore, the 2-D images of water specimen and mini tomato with high-image resolution of better than 2 mm are obtained by using our low-field MRI system. Our high-T\rm c SQUID-based low-field MRI system promises a low-cost and high imaging quality in microtesla magnetic fields.

原文英語
文章編號6401170
期刊IEEE Transactions on Applied Superconductivity
23
發行號3
DOIs
出版狀態已發佈 - 2013

ASJC Scopus subject areas

  • 電子、光磁材料
  • 凝聚態物理學
  • 電氣與電子工程

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