Rotating-frame gradient fields for magnetic resonance imaging and nuclear magnetic resonance in low fields

Bouchard, Louis-Serge; Pines, Alexander; Demas, Vasiliki

Title: Rotating-frame gradient fields for magnetic resonance imaging and nuclear magnetic resonance in low fields

Abstract

A system and method for Fourier encoding a nuclear magnetic resonance (NMR) signal is disclosed. A static magnetic field B.sub.0 is provided along a first direction. An NMR signal from the sample is Fourier encoded by applying a rotating-frame gradient field B.sub.G superimposed on the B.sub.0, where the B.sub.G comprises a vector component rotating in a plane perpendicular to the first direction at an angular frequency .omega.in a laboratory frame. The Fourier-encoded NMR signal is detected.

Inventors:: Bouchard, Louis-Serge; Pines, Alexander; Demas, Vasiliki

Issue Date:: 2014-01-21

Research Org.:: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1117841

Patent Number(s):: 8633693

Application Number:: 12/594,341

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

Patent Classifications (CPCs):: G - PHYSICS G01 - MEASURING G01R - MEASURING ELECTRIC VARIABLES

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G - PHYSICS G01 - MEASURING G01R - MEASURING ELECTRIC VARIABLES
G01R33/56581 - {due to Maxwell fields, i.e. concomitant fields}
G01R33/48 - NMR imaging systems
G01R33/483 - with selection of signals or spectra from particular regions of the volume, e.g. in vivo spectroscopy
G01R33/445 - {MR involving a non-standard magnetic field B0, e.g. of low magnitude as in the earth's magnetic field or in nanoTesla spectroscopy, comprising a polarizing magnetic field for pre-polarisation, B0 with a temporal variation of its magnitude or direction such as field cycling of B0 or rotation of the direction of B0, or spatially inhomogeneous B0 like in fringe-field MR or in stray-field imaging}
G01R33/56341 - {Diffusion imaging}
G01R33/4833 - {using spatially selective excitation of the volume of interest, e.g. selecting non-orthogonal or inclined slices}

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DOE Contract Number:: AC02-05CH11231

Resource Type:: Patent

Resource Relation:: Patent File Date: 2008 Apr 02

Country of Publication:: United States

Language:: English

Subject:: 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY

Citation Formats


                    Bouchard, Louis-Serge, Pines, Alexander, and Demas, Vasiliki. Rotating-frame gradient fields for magnetic resonance imaging and nuclear magnetic resonance in low fields.  United States: N. p., 2014. 
        Web.

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                    Bouchard, Louis-Serge, Pines, Alexander, & Demas, Vasiliki. Rotating-frame gradient fields for magnetic resonance imaging and nuclear magnetic resonance in low fields.  United States.

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                    Bouchard, Louis-Serge, Pines, Alexander, and Demas, Vasiliki. Tue .  
        "Rotating-frame gradient fields for magnetic resonance imaging and nuclear magnetic resonance in low fields".  United States.  https://www.osti.gov/servlets/purl/1117841.

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@article{osti_1117841,

  title        = {Rotating-frame gradient fields for magnetic resonance imaging and nuclear magnetic resonance in low fields},

  author       = {Bouchard, Louis-Serge and Pines, Alexander and Demas, Vasiliki},

  abstractNote = {A system and method for Fourier encoding a nuclear magnetic resonance (NMR) signal is disclosed. A static magnetic field B.sub.0 is provided along a first direction. An NMR signal from the sample is Fourier encoded by applying a rotating-frame gradient field B.sub.G superimposed on the B.sub.0, where the B.sub.G comprises a vector component rotating in a plane perpendicular to the first direction at an angular frequency .omega.in a laboratory frame. The Fourier-encoded NMR signal is detected.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {2014},

  month        = {1}

}

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Works referenced in this record:

Unidirectional magnetic-field gradients and geometric-phase errors during Fourier encoding using orthogonal ac fields
journal, August 2006

Bouchard, Louis-S.
Physical Review B, Vol. 74, Issue 5
https://doi.org/10.1103/PhysRevB.74.054103

New approaches to NMR imaging in a rotating field gradient
journal, April 1989

Cory, D. G.
Journal of Magnetic Resonance (1969), Vol. 82, Issue 2, p. 337-341
https://doi.org/10.1016/0022-2364(89)90035-8

Theory of MRI in the presence of zero to low magnetic fields and tensor imaging field gradients
journal, September 2006

Meriles, C. A.; Sakellariou, D.; Trabesinger, A. H.
Journal of Magnetic Resonance, Vol. 182, Issue 1, p. 106-114
https://doi.org/10.1016/j.jmr.2006.06.018

Image artifacts in very low magnetic field MRI: The role of concomitant gradients
journal, June 2005

Yablonskiy, Dmitriy A.; Sukstanskii, Alexander L.; Ackerman, Joseph J. H.
Journal of Magnetic Resonance, Vol. 174, Issue 2, p. 279-286
https://doi.org/10.1016/j.jmr.2005.02.016

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Title: Rotating-frame gradient fields for magnetic resonance imaging and nuclear magnetic resonance in low fields

Abstract

Citation Formats

Unidirectional magnetic-field gradients and geometric-phase errors during Fourier encoding using orthogonal ac fields journal, August 2006

New approaches to NMR imaging in a rotating field gradient journal, April 1989

Theory of MRI in the presence of zero to low magnetic fields and tensor imaging field gradients journal, September 2006

Image artifacts in very low magnetic field MRI: The role of concomitant gradients journal, June 2005

Unidirectional magnetic-field gradients and geometric-phase errors during Fourier encoding using orthogonal ac fields
journal, August 2006

New approaches to NMR imaging in a rotating field gradient
journal, April 1989

Theory of MRI in the presence of zero to low magnetic fields and tensor imaging field gradients
journal, September 2006

Image artifacts in very low magnetic field MRI: The role of concomitant gradients
journal, June 2005