Electricity: measuring and testing – Particle precession resonance – Using a nuclear resonance spectrometer system
Patent
1989-06-20
1991-03-12
Williams, Hezron E.
Electricity: measuring and testing
Particle precession resonance
Using a nuclear resonance spectrometer system
G01R 3328, G01R 3344
Patent
active
049995804
ABSTRACT:
Disclosed is a method of obtaining magnetic resonance signals from a body which are spatially and spectrally selective comprising the steps of applying a static magnetic field (Bo) to said body thereby aligning nuclear spins, applying a modulated magnetic gradient (G(t)) to said body, applying an RF excitation pulse (B(t)) to said body to tip said nuclear spins, said RF excitation pulse being related to said modulated magnetic gradient whereby resulting magnetic resonance signals are spatially and spectrally dependent, and detecting said magnetic resonance signals. The steps can be repeated in a multi-slice or multi-spectral acquisition mode. The steps can be repeated in a rapid gradient echo pulse sequence.
REFERENCES:
patent: 4794337 (1988-12-01), Twieg
patent: 4812760 (1989-03-01), Bottomley et al.
patent: 4843549 (1989-06-01), McKinnon
patent: 4847559 (1989-07-01), Keren
Meyer et al., "Selective Excitation for Fast Imaging", 2nd European Congress of NMR in Medicine and Biology, Berling, Jun. 23-26, 1988.
Meyer et al., ". . . Spatial and Spectral Selective . . . ", 7th Annual Meeting SMRM, San Francisco, CA., Aug. 20-26, 1988.
Pauly et al., ". . . K-Space Analysis . . . ", J. of Magnetic Resonance, vol. 81, pp. 43-56, 1989.
Joseph, ". . . Chemical Shift MR Imaging . . . ", J. of Computer Assisted Tomography, vol. 9, No. 4, Jul./Aug., 1985.
Dumoulin, ". . . Chemical-Shift14 Selective Imaging", Magnetic Resonance in Medicine 2, pp. 583-585, 1985.
Volk et al., "Chemical Shift-Specific Slice Selection . . . ", J. of Magn. Res. 71, pp. 68-174, 1987.
Park et al., "Gradient Reversal Technique . . . ", Magn. Res. in Med. 4, pp. 526-536, 1987.
Brown et al., "NMR Chemical Shift . . . ", Proc. Natl. Acad. Sci., U.S.A., vol. 79, pp. 3523-3526, Jun., 1982.
Ljunggren, ". . . Fourier-Based Imaging Method", J. of Magn. Res. 54, 338-343, 1983.
Twieg, ". . . K-Trajectory . . . ", Med. Phys. 10(5), Sep./Oct., 1983.
Haase et al., "Flash Imaging . . . ", J. of Magn. Res. 67, pp. 258-266, 1986.
Wehrili, ". . . Fast Scan magnetic Resonance", General Electric Medical Systems, 1985.
Shenberg, ". . . Time Varying Gradients", Dissertation, Dept. of Electrical Engineering, Stanford Univ., Aug., 1986.
Rzedzian, ". . . Whole-Body MR Imaging . . . ", Proc. 6th Annual Meeting SMRM, pp. 229, 1987.
Coxon et al., ". . . Separated Images . . . ", Proc. 7th Annual Meeting SMRM, pp. 242, 1988.
Murdoch et al., ". . . Multislice Imaging", J. of Magn. Res. 74, pp. 226-263, 1987.
Connolly et al., ". . . Solutions to . . . Selective Excitation Problem", IEEE Trans. on Medical Imaging, vol. MI-5, No. 2, Jun., 1986.
Meyer Craig H.
Pauly John M.
O'Shea Kevin D.
The Board of Trustees of the Leland Stanford Junior University
Williams Hezron E.
Woodward Henry K.
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