Electricity: measuring and testing – Particle precession resonance – Using a nuclear resonance spectrometer system
Patent
1987-07-07
1989-01-17
Levy, Stewart J.
Electricity: measuring and testing
Particle precession resonance
Using a nuclear resonance spectrometer system
128653, 324312, G01R 3320
Patent
active
047990155
ABSTRACT:
The invention relates to a method of mapping the local distribution of B.sub.1 -dispersion of relaxation tim T.sub.1.rho. of the nucleus of a certain element, such as hydrogen or phosphorus of an object, such as e.g. a human body or a part of it, or the trunk of a tree. In the method of this invention, an object area is first subjected to a first excitation pulse, which tilts the magnetization of the nuclei of said object area preferably 90.degree. and thereafter to a locking pulse, whose phase and frequency are selected in a manner that relaxation with respect to the magnetic vector of this locking pulse takes place, followed by performing the required procedures by applying per se known nuclear spin imaging methods, and the above sequence of operations is repeated as many times as desired by changing the amplitude of said locking pulse.
REFERENCES:
patent: 4070611 (1978-01-01), Ernst
patent: 4110681 (1978-08-01), Hofer et al.
patent: 4345207 (1982-08-01), Bertrand et al.
patent: 4563647 (1986-01-01), Young
W. J. Freeman et al., Automated Nonselective Measurement of T1.rho. by Fourier Transform NMR, Rev. Sci. Inst., vol. 47, No. 1, Jan. 1976.
A. O. Goedde et al., A Computer . . . Relaxation Times, Chemical Inst. vol. 7, No. 3, 1976.
Furushima, E. et al., Experimental Pulse NMR A Nuts and Bolts Approach, Addison-Wesley Publishing Co., Inc. 1981.
Knispel, R. R. et al., "Dispersion of Proton Spin-Lattice Relaxation", J. Magn. Reson., vol. 14, 1974.
Abragam, A., The Principles of Nuclear Magnetism, Clarendon Press, Oxford.
Slichter, C. P., Principles of Magnetic Resonance, 2nd Edition, Springer-Verlag.
Mathur-DeVre, R., "The NMR Studies of Water in Biological Systems", Prog. Biophys. Molec. Biol., vol. 35, 1979.
Redfield, A. G., "Nuclear Magnetic Resonance Saturation and Rotary Saturation in Solids", Physical Review, vol. 98, No. 6, Jun. 15, 1955.
Koenig, S. H. et al., "Magnetic Field Dependence of 1/T.sub.1 of Protons in Tissue", Investigative Radiology, Mar.-Apr., 1984.
Finch, E. D. et al., "Mobility of Water . . . Proton NMR Relaxation Study", Biochem. Biophys. Acta. 406, 1975.
Jones, G. P., "Spin-Lattice Relaxation . . . Weak-Collision Case", Physical Review, vol. 148, No. 1, Aug. 5, 1966.
Ailion, D. C., "NMR and Ultraslow Motions", Advances in Magnetic Resonance, vol. 5, 1971.
Sepponen, R. E., "A Method for T.sub.1.rho. Imaging", J. Computer Assisted Tomography, 9(6), Nov./Dec., 1985.
Diegel, J. G. et al., "Origin of the Nonexponentiality . . . Stin Relaxations in Tissues", Biophysical Journal, vol. 15, 1975.
Instrumentarium Corp.
Levy Stewart J.
O'Shea Kevin D.
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