Methods of imaging solids by NMR techniques

Details Methods of imaging solids by NMR techniques Methods of imaging solids by NMR techniques

1987-09-02

1989-05-23

Tokar, Michael J.

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

324307, G01R 3320

Patent

active

048334111

ABSTRACT:
A sequence of a pair of r.f. pulses (90.sub.x .degree. and 90.sub.y .degree.) is applied to a solid being imaged with a time interval (.tau.) after each pulse. A static magnetic field is maintained and a magnetic gradient field is superimposed in the said time intervals, the time integrals of the gradient magnitudes of the gradient fields being equal. A free induction solid echo signal is detected at the end of the second time interval. The sequence is repeated for different values of the time integral are to obtain a set of signals and Fourier transformations with respect to the said time integral are then carried out on the set to obtain one-dimensional information. Two-dimensional information can be obtained from a plurality of sets of signals, each set being obtained in the presence of an additional orthogonal gradient field of differing value for each set.

REFERENCES:
patent: 4291272 (1981-09-01), Hofer et al.
patent: 4613949 (1986-09-01), Glover
patent: 4651097 (1987-03-01), Iwaoka
patent: 4714882 (1987-12-01), Nagayama
Physica 128B (1985) 79-80 S. Emid "Ultra High Resolution Multiple Quantum Spectroscopy in Solids".
Physica 128B (1985) 81-83 S. Emid and J. H. N. Creyghton, "High Resolution NMR Imaging in Solids".

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