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Ultra-low-field MRI for the detection of liquid explosives
Ultra-low-field MRI for the detection of liquid explosives
- Source :
- Superconductor Science and Technology. 23:034023
- Publication Year :
- 2010
- Publisher :
- IOP Publishing, 2010.
-
Abstract
- Recently it has become both possible and practical to use magnetic resonance (MR) at magnetic fields in the range from µT to mT, the so-called ultra-low-field (ULF) regime. SQUID (superconducting quantum interference device) sensor technology allows for ultra-sensitive detection while pulsed pre-polarizing fields greatly enhance the signal. The instrumentation allows for unprecedented flexibility in signal acquisition sequences and simplified MRI instrumentation. Here we present results for a new application of ULF MRI and relaxometry for the detection and characterization of liquids. We briefly describe the motivation and advantages of the ULF MR approach, and present recent results from a seven-channel ULF MRI/relaxometer system constructed to non-invasively inspect liquids at a security checkpoint for the presence of hazardous material. The instrument was deployed at the Albuquerque International Airport in December 2008, and results from that endeavor are also presented.
- Subjects :
- Physics
Relaxometry
Ultra low field
Acoustics
Metals and Alloys
Condensed Matter Physics
Signal
Object detection
law.invention
Magnetic field
SQUID
Nuclear magnetic resonance
law
Materials Chemistry
Ceramics and Composites
Measuring instrument
Instrumentation (computer programming)
Electrical and Electronic Engineering
Subjects
Details
- ISSN :
- 13616668 and 09532048
- Volume :
- 23
- Database :
- OpenAIRE
- Journal :
- Superconductor Science and Technology
- Accession number :
- edsair.doi...........f1fc073ec469b5732c7fa2519802228b
- Full Text :
- https://doi.org/10.1088/0953-2048/23/3/034023