NMR imaging method

Details NMR imaging method NMR imaging method

1986-12-22

1988-07-26

Tokar, Michael J.

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

324312, G01R 3320

Patent

active

047603399

ABSTRACT:
An NMR imaging method is disclosed in which an object is measured in accordance with a pulse sequence capable of expressing a difference between two of a plurality of chemical shifts by a phase difference in a signal, that is, a pulse sequence 90.degree.-.tau..sub.a -180.degree.-.tau..sub.b -spin echo (where .tau..sub.a .noteq..tau..sub.b) to obtain spin distribution data, a histogram with respect to the phase of the spin distribution data is formed to regard a phase corresponding to that one of a plurality of peaks of the histogram which exists at one end of the histogram, as a position-independent offset phase which is contained in the spin distribution data and is peculiar to an NMR imaging apparatus, and the spin distribution data is corrected using the offset value thus obtained, to extract spin density distribution data for each of the chemical shifts from the corrected spin distribution data.

REFERENCES:
patent: 4509015 (1985-04-01), Ordidge
patent: 4585992 (1986-04-01), Maudsley
patent: 4588948 (1986-05-01), Mansfield
A. Kumar, "NMR Fourier Zeugmatography", Jour. of Mag. Res., vol. 18, 1975, pp. 69-83.
W. Dixon, "Simple Proton Spectroscopic Imaging", Radiology, vol. 153, 1984, pp. 189-194.
Edelstein, "Spin Warp NMR Imaging and Applications to Human Whole Body Imaging", Physics in Medicine and Biology, vol. 25, 1980, pp. 751-756.

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