Method and device for forming images by nuclear magnetic resonan

Details Method and device for forming images by nuclear magnetic resonan Method and device for forming images by nuclear magnetic resonan

1986-03-24

1988-02-23

Noland, Tom

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

G01R 3320

Patent

active

047273267

ABSTRACT:
The invention provides a method and device for forming images by nuclear magnetic resonance in which an image is constructed by discrimination of the intrinsic parameters of the tissues examined. The image is formed by putting forward the degrees of attachment and mobility of the nuclei of the tissues. The parameters displayed represent the field heterogeneities at the microscopic and molecular levels. The method consists in acquiring a first image using conventional methods then, after slightly varying the orientater magnetic field, in acquiring another image using the same methods. Then an image of another type is formed by representing the relative variations of the relaxation times between this first and this second image.

REFERENCES:
patent: 4607223 (1986-08-01), Mallard et al.
patent: 4620154 (1986-10-01), Inouge
Physics in Medicine and Biology, vol. 25, No. 4, 1980, pp. 748-751, Londres, GB; C. R. Ling, et al.; "Comparision of NMR Water Proton T1 Relaxation Times of Rabbit Tissues at 24 MHz and 2.5 MHz" p. 749, lines 1-7; p. 749, lines 30-34; p. 751, lines 7-10.
Journal of Nuclear Medicine, vol. 25, No. 3, Mar. 1984, pp. 371-382, the Society of Nuclear Medicine Inc., New York, U.S.; J. A. Koutcher, et al.,: "Principles of Imaging by Nuclear Magnetic Resonance" *pp. 375-378: Contrast and Pulse Sequences*.
IEEE Spectrum, vol. 20, No. 2, Feb. 1983, pp. 32-38, New York, U.S.; P. A. Bottomley: "Nuclear Magnetic Resonance; Beyond Physical Imaging" *pp. 33-36*.

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