Spatially selective NMR

Details Spatially selective NMR Spatially selective NMR

1982-09-08

1985-07-09

Tokar, Michael J.

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

324318, G01R 3308

Patent

active

045285098

ABSTRACT:
In a method of high resolution pulsed NMR spectroscopy, the r.f. field is deliberately made inhomogeneous and a special pulse sequence is used to ensure that the received signals emanate predominantly from a selected region of the sample. Thus, the acquisition pulse (70) from which the FID signal (72) results is preceded by a preparatory treatment involving at least one r.f. pulse (66) which is a 180.degree. pulse in respect of nuclei of interest in the selected region, preferably followed by a d.c. pulse (68) giving rise to a magnetic field gradient superimposed on the main alignment field.

REFERENCES:
patent: 3932805 (1976-01-01), Abe
patent: 4290019 (1981-09-01), Hutchison

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