Squid detected NMR and MRI at ultralow fields

Clarke, John; McDermott, Robert; Pines, Alexander; Trabesinger, Andreas Heinz

Squid detected NMR and MRI at ultralow fields

Patent · Tue May 30 00:00:00 EDT 2006

OSTI ID:1175766

Clarke, John; McDermott, Robert; Pines, Alexander; Trabesinger, Andreas Heinz

Nuclear magnetic resonance (NMR) signals are detected in microtesla fields. Prepolarization in millitesla fields is followed by detection with an untuned dc superconducting quantum interference device (SQUID) magnetometer. Because the sensitivity of the SQUID is frequency independent, both signal-to-noise ratio (SNR) and spectral resolution are enhanced by detecting the NMR signal in extremely low magnetic fields, where the NMR lines become very narrow even for grossly inhomogeneous measurement fields. MRI in ultralow magnetic field is based on the NMR at ultralow fields. Gradient magnetic fields are applied, and images are constructed from the detected NMR signals.

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Research Organization:: The Regents of the University of California, Oakland, CA (United States)

Sponsoring Organization:: USDOE

DOE Contract Number:: AC03-76SF00098

Assignee:: The Regents of th University of California (Oakland, CA)

Patent Number(s):: 7,053,610

Application Number:: 10/995,765

OSTI ID:: 1175766

Country of Publication:: United States

Language:: English

References (42)

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