Application of Ultra-Low Field HTS-SQUID NMR/MRI to Contaminant Detection in Food

被引：10
作者：
Hatsukade, Y. [1 ]
Abe, T. [1 ]
Tsunaki, S. [1 ]
Yamamoto, M. [1 ]
Murata, H. [1 ]
Tanaka, S. [1 ]
机构：
[1] Toyohashi Univ Technol, Toyohashi, Aichi 4418580, Japan
来源：
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 2013年 / 23卷 / 03期
关键词：
Contaminant detection; high-temperature superconductor (HTS)-rf-SQUID; nuclear magnetic resonance (NMR)/magnetic resonance imaging (MRI); permanent magnet; ultra-low field; MICROTESLA MAGNETIC-FIELDS;
D O I：
10.1109/TASC.2012.2237473
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
We constructed an ultra-low field nuclear magnetic resonance (NMR)/magnetic resonance imaging (MRI) system utilizing a high-temperature superconductor (HTS) SQUID and permanent magnet for application of contaminant detection in food and drink. In order to compensate shortage of signal-to-noise ratio of the HTS-SQUID-based system, a pair permanent magnet of 1.1 T was employed for prepolarization field. It was combined with a sample transfer apparatus, which transferred a water sample with contaminant in a 10-ml glass bottle from the magnet to under the SQUID magnetometer within 0.5 s. Feasibility of contaminant detection in drink was demonstrated using the system by measuring NMR and 1-D MRI of water samples including contaminants of stainless steel, aluminum, and polymer. 2-D MRI measurement of a sample with partitioned water by silicone bulk was demonstrated employing the filtered back projection reconstruction method.
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