Method of determining the nuclear magnetization distribution, an

Details Method of determining the nuclear magnetization distribution, an Method of determining the nuclear magnetization distribution, an

1989-03-10

1990-07-03

Tokar, Michael J.

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

324307, G01R 3320

Patent

active

049394614

ABSTRACT:
A method of and a system for, determining the nuclear magnetization distribution, where a plurality of sequences act on an examination zone in the presence of a uniform, steady magnetic field, each sequence comprising an r.f. pulse whereby, in conjunction with a magnetic gradient field, the nuclear magnetization in the zones situated on both sides of a layer to be examined is excited and possibly dephased. The r.f. peak power can be reduced by modulating a signal on a carrier whose frequency corresponds to the Larmor frequency in the center of the layer to be examined, the frequency of said signal varying in a range which corresponds to differences between said Larmor frequency and the Larmor frequencies in one of the zones.

REFERENCES:
patent: 4820984 (1989-04-01), Kuhn et al.
patent: 4843549 (1989-06-01), McKinnon

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