The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 06, 2007
Filed:
Nov. 03, 2004
John Clarke, Berkeley, CA (US);
Nathan Kelso, Albany, CA (US);
Seungkyun Lee, Berkeley, CA (US);
Michael Moessle, Berkeley, CA (US);
Whittier Myers, Berkeley, CA (US);
Robert Mcdermott, Santa Barbara, CA (US);
Bernard Ten Haken, Enschede, NL;
Alexander Pines, Berkeley, CA (US);
Andreas Trabesinger, Zurich, CH;
John Clarke, Berkeley, CA (US);
Nathan Kelso, Albany, CA (US);
SeungKyun Lee, Berkeley, CA (US);
Michael Moessle, Berkeley, CA (US);
Whittier Myers, Berkeley, CA (US);
Robert McDermott, Santa Barbara, CA (US);
Bernard ten Haken, Enschede, NL;
Alexander Pines, Berkeley, CA (US);
Andreas Trabesinger, Zurich, CH;
The Regents of the University of California, Oakland, CA (US);
Abstract
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. Additional signal to noise benefits are obtained by use of a low noise polarization coil, comprising litz wire or superconducting materials. 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.