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

Abstract

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.

Authors:
; ;  [1]
  1. Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California 91109 (United States)
Publication Date:
OSTI Identifier:
22314281
Resource Type:
Journal Article
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 85; Journal Issue: 9; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0034-6748
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; CRYOGENIC FLUIDS; HELIUM; IMAGES; NMR IMAGING; SQUID DEVICES; SUPERCONDUCTING MAGNETS; TEMPERATURE RANGE 0065-0273 K

Citation Formats

Eom, Byeong Ho, Penanen, Konstantin, and Hahn, Inseob, E-mail: ihahn@caltech.edu. A cryogen-free ultralow-field superconducting quantum interference device magnetic resonance imaging system. United States: N. p., 2014. Web. doi:10.1063/1.4895998.
Eom, Byeong Ho, Penanen, Konstantin, & Hahn, Inseob, E-mail: ihahn@caltech.edu. A cryogen-free ultralow-field superconducting quantum interference device magnetic resonance imaging system. United States. doi:10.1063/1.4895998.
Eom, Byeong Ho, Penanen, Konstantin, and Hahn, Inseob, E-mail: ihahn@caltech.edu. Mon . "A cryogen-free ultralow-field superconducting quantum interference device magnetic resonance imaging system". United States. doi:10.1063/1.4895998.
@article{osti_22314281,
title = {A cryogen-free ultralow-field superconducting quantum interference device magnetic resonance imaging system},
author = {Eom, Byeong Ho and Penanen, Konstantin and Hahn, Inseob, E-mail: ihahn@caltech.edu},
abstractNote = {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.},
doi = {10.1063/1.4895998},
journal = {Review of Scientific Instruments},
issn = {0034-6748},
number = 9,
volume = 85,
place = {United States},
year = {2014},
month = {9}
}