NMR imaging method

Details NMR imaging method NMR imaging method

1986-10-16

1988-02-23

Levy, Stewart J.

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

324312, G01R 3320

Patent

active

047273259

ABSTRACT:
An NMR imaging method using a rotating field gradient is disclosed in which transverse magnetization is prepared in a portion of an object to be inspected, by the 90.degree.-180.degree. RF pulse excitation, a rotating field gradient is generated to perform a sampling operation for an output signal in a state that the position of signal in a phase space is revolved, the intensity or rotational speed of the rotating field gradient is varied stepwise or continuously to obtain data arranged on concentric circles or a spiral in the phase space, and the data thus obtained undergoes Fourier transformation in each of a plurality of radial directions or two-dimensional Fourier transformation, to form an image of spin distribution.

REFERENCES:
patent: 4307343 (1981-12-01), Likes
patent: 4642567 (1987-02-01), Kaplan
patent: 4651096 (1987-03-01), Buonocore
Hinshaw, W., "Image Formation by Nuclear Magnetic Resonance: The Sensitive-Point Method", J. App. Phys., vol. 47, No. 8, Aug. 1976.
Ljunggren, S., "A Simple Graphical Representation of Fourier-Based Imaging Methods", J. Mag. Res. 54, pp. 338-343, 1983.
Kumar et al., "NMR Fourier Zeumatography", J. Mag. Res. 13, pp. 69-83, 1975.

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