Ultra-Low Field High Tc SQUID NMR/MRI System with 77K Cooled Copper Flux Transformer
Ultra-Low Field High Tc SQUID NMR/MRI System with 77K Cooled Copper Flux Transformer
复制标题
配备 77K 冷却铜通量变压器的超低场高 Tc SQUID NMR/MRI 系统
DOI：
10.1109/tasc.2015.2512798
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发表时间：
2016
影响因子：
1.8
通讯作者：
J. Hatta and S. Ariyoshi
中科院分区：
文献类型：
--
作者：
S. Tanaka;Y. Hirose;M. Yamamoto;H. Toyota;S. Kawagoe;J. Hatta and S. Ariyoshi
我们提出了一种用于食品检测的高温超导量子干涉装置超低场磁共振成像（ULF MRI）系统。虽然ULF MRI是紧凑和低成本的，但与传统的高场MRI相比，检测到的信号非常弱。因此，在实现MRI系统之前，构建并优化了核磁共振（NMR）系统。研究的目的是提高核磁共振信号的信噪比。采用液氮冷却的77 K铜绕磁通Transformer和谐振技术进行了提高信噪比的实验研究。其结果是，测量的SNR约等于236与谐振，提高了7.8倍。
We propose a high-Tcsuperconducting quantum interference device ultralow-field magnetic resonance imaging (ULF MRI) system for food inspection. Although the ULF MRI is compact and low cost, compared with a conventional high-field MRI, the detected signal is extremely weak. Thus, a nuclear magnetic resonance (NMR) system was constructed and optimized before realizing the MRI system. The purpose of the study is to improve the signal-to-noise ratio (SNR) of the NMR signal. A copper-wound flux transformer cooled at 77 K by liquid nitrogen andresonance were employed and tested to improve the SNR. As a result, the measured SNR was approximately equal to 236 withresonance, improving by a factor of 7.8.