A cryogen-free ultralow-field superconducting quantum interference device magnetic resonance imaging system

被引：1

作者：

Eom, Byeong Ho ^{[1
]}

Penanen, Konstantin ^{[1
]}

Hahn, Inseob ^{[1
]}

机构：

[1] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 2014年 / 85卷 / 09期

基金：

美国国家航空航天局;

关键词：

MICROTESLA MRI; SQUID; MEG;

D O I：

10.1063/1.4895998

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Magnetic resonance imaging (MRI) at microtesla fields using superconducting quantum interference device (SQUID) detection has previously been demonstrated, and advantages have been noted. Although the ultralow-field SQUID MRI technique would not need the heavy superconducting magnet of conventional MRI systems, liquid helium required to cool the low-temperature detector still places a significant burden on its operation. We have built a prototype cryocooler-based SQUID MRI system that does not require a cryogen. The SQUID detector and the superconducting gradiometer were cooled down to 3.7 K and 4.3 K, respectively. We describe the prototype design, characterization, a phantom image, and areas of further improvements needed to bring the imaging performance to parity with conventional MRI systems. (C) 2014 AIP Publishing LLC.

引用

页数：9

共 19 条

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[2]

[Anonymous], 2015, Electromagnetic Theory

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