Electricity: measuring and testing – Particle precession resonance – Using a nuclear resonance spectrometer system
Patent
1989-08-14
1990-08-07
Tokar, Michael J.
Electricity: measuring and testing
Particle precession resonance
Using a nuclear resonance spectrometer system
324300, G01R 3320
Patent
active
049471198
ABSTRACT:
Several magnetic resonance imaging (MRI) methods using adiabatic excitation are disclosed. One method accomplishes slice selection with gradient modulated adiabatic excitation. Another method employs slice selection with adiabatic excitation despite large variations in B.sub.1 magnitude. There is also described .sup.1 H spectroscopy using solvent suppressive adiabatic pulses.
REFERENCES:
patent: 4390840 (1983-06-01), Ganssen
patent: 4390940 (1983-06-01), Ganssen et al.
patent: 4480228 (1984-10-01), Bottomley
patent: 4486709 (1984-12-01), Bendall
patent: 4528508 (1985-07-01), Vail, III
patent: 4535290 (1985-08-01), Post et al.
patent: 4551680 (1985-11-01), Macovski
patent: 4695799 (1987-09-01), Hardy et al.
patent: 4744466 (1988-09-01), Sattin
patent: 4820983 (1989-04-01), Bendall
D. G. Norris and A. Haase, "Variable Excitation Angle AFP Pulses", Magnetic Resonance in Medicine, 9, pp. 435-440, (1989).
"Solvent Suppression in Fourier Transform Nuclear Magnetic Resonance", P. J. Hore, Journal of Magnetic Resonance, vol. 55, p. 383, (1983).
"Volume-Selective Excitation, A Novel Approach to Topical NMR", W. P. Aue et al., Journal of Magnetic Resonance, vol. 56, pp. 350-354, (1984).
"Depth-Resolved Surface-Coil Spectroscopy (DRESS) for in Vivo .sup.1 H, .sup.31 P, and .sup.13 C NMR", Paul A. Bottomley et al., Journal of Magnetic Resonance, vol. 59, pp. 338-342, (1984).
"Communications: Toward Biochemical Imaging", S. J. Cox and P. Styles, Journal of Magnetic Resonance, vol. 40, pp. 209-212, (1980).
"Broadband Population Inversion by Phase Modulated Pulses", J. Baum, R. Tycko, and A. Pines, Journal of Chemical Physics, vol. 79, p. 4643, (1983).
"Spatial Localization of High Resolution .sup.31 P Spectra with a Surface Coil", Axel Haase et al., Journal of Magnetic Resonance, vol. 55, pp. 164-169, (1983).
"Rotating Frame Zeugmatography", D. I. Hoult, Journal of Magnetic Resonance, vol. 33, pp. 183-197, (1979).
"Principles of Magnetic Resonance", C. P. Slichter, 2nd ed., p. 24, Springer-Verlag, Berlin/New York, 1979.
"Mapping of Metabolites in Whole Animals by .sup.31 P NMR Using Surface Coils", Joseph J. H. Ackerman et al., Nature, vol. 283, pp. 167-170, (Jan. 10, 1980).
"Uniform Sample Excitation with Surface Coils for in Vivo Spectroscopy by Adiabatic Rapid Half Passage", M. Robin Bendall and David T. Pegg, Journal of Magnetic Resonance, vol. 67, pp. 376-381, (1986).
"Improved Selective 180.degree. Radiofrequency Pulses for Magnetization Inversion and Phase Reversal", Hong Yan and John C. Gore, Journal of Magnetic Resonance, vol. 71, pp. 116-131, (1987).
"Image-Selected in Vivo Spectroscopy (ISIS), A New Technique for Spatially Selective NMR Spectroscopy", R. J. Ordidge et al., Journal of Magnetic Resonance, vol. 66, pp. 283-294, (1986).
"Solvent-Suppressed Spatially Resolved Spectroscopy, An Approach to High-Resolution NMR on a Whole-Body MR System", Peter R. Luyten et al., Journal of Magnetic Resonance, vol. 67, pp. 148-155, (1986).
"Magnetic Resonance Imaging with Adiabatic Pulses Using a Single Surface Coil for RF Transmission and Signal Detection", M. Garwood, K. Ugurbil, A. Rath, M. R. Bendall, B. Ross, S. Mitchell, and H. Merkle, Magnetic Resonance in Medicine, vol. 9, pp. 25-34, (Jan. 1989).
"Slice Selection with Gradient-Modulated Adiabatic Excitation Despite the Presence of Large B.sub.1 Inhomogeneities", A. Johnson, M. Garwood, and K. Ugurbil, Journal of Magnetic Resonance, vol. 81, pp. 653-660, (1989).
"Slice Selection with Adiabatic Excitation Despite Large Variations in B.sub.1 Magnitude", A. J. Johnson, K. Ugurbil, and M. Garwood, Abstract submitted for Seventh Annual Meeting of the Society of Magnetic Resonance in Medicine, (Aug. 20, 1988).
"Slice Selection with Gradient Modulated Adiabatic Excitation", A. J. Johnson, M. Garwood, and K. Ugurbil, Abstract submitted for Seventh Annual Meeting of the Society of Magnetic Resonance in Medicine, (Aug. 20, 1988).
"Slice Selection with an Adiabatic Half-Passage Pulse Which is Insensitive to RF Inhomogeneity", M. Garwood, A. J. Johnson, H. Merkle, and K. Ugurbil, Abstracts, Second European Congress of NMR in Medicine and Biology, Berlin, p. 40, (Jun. 23, 1988).
".sup.1 H Spectroscopy Using Solvent Suppressive Adiabatic Pulses (SSAP)", M. Garwood, B. D. Ross, S. L. Mitchell, K. Hendrich, and H. Merkle, Abstract submitted for Seventh Annual Meeting of the Society of Magnetic Resonance in Medicine, (Aug. 20, 1988).
"Amplitude and Frequency/Phase Modulated Refocusing Pulses that Induce Plane Rotations Even in the Presence of Inhomogeneous B.sub.1 Fields", K. Ugurbil, M. Garwood, A. Rath, and M. R. Bendall, Journal of Magnetic Resonance, vol. 78, pp. 472-497, (Aug. 1988).
"Optimization of Modulation Functions to Improve Insensitivity of Adiabatic Pulses to Variations in B.sub.1 Magnitude", K. Ugurbil, M. Garwood, and A. Rath, Journal of Magnetic Resonance, vol. 80, pp. 448-469, (Dec. 1988).
"Amplitude and Frequency Modulated Pulses to Achieve 90.degree. Plane Rotations with Inhomogeneous B.sub.1 Fields", K. Ugurbil, M. Garwood, and M. R. Bendall, Journal of Magnetic Resonance, vol. 72, pp. 177-185, (Mar. 1987).
"Communications: Adiabatic Refocusing Pulse which Compensates for Variable rf Power and Off-Resonance Effects", M. R. Bendall, M. Garwood, K. Ugurbil, and D. T. Pegg, Magnetic Resonance in Medicine, vol. 4, pp. 493-499, (May 1987).
"A Method for Localizing High-Resolution NMR Spectra from Human Subjects", Peter Styles et al., Magnetic Resonance in Medicine, vol. 2, pp. 402-409, (1985).
"NMR Imaging and Spectroscopic Techniques in Biology and Medicine", Randall Rue, HPA Bulletin, pp. 19-27, (Dec. 1985).
"Highly Selective .pi./2 and .pi. Pulse Generation", M. S. Silver et al., Journal of Magnetic Resonance, vol. 59, pp. 347-351, (1984).
"Selective Spin Inversion in Nuclear Magnetic Resonance and Coherent Optics Through and Exact Solution of the Bloch-Riccati Equation", M. S. Silver et al., Physical Review, vol. 31, No. 4, (Apr. 1985).
Garwood Michael
Ugurbil Kamil
Tokar Michael J.
University of Minnesota
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