Nuclear magnetic resonance systems

Details Nuclear magnetic resonance systems Nuclear magnetic resonance systems

1980-08-05

1983-05-17

Tokar, Michael J.

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

324312, G01R 3308

Patent

active

043842550

ABSTRACT:
The invention concerns the production of gradient fields for nuclear magnetic resonance apparatus particularly imaging apparatus. It has been earlier proposed that samples of the resonance signal be taken at intervals such that the field gradient integrals in each such interval are the same. This sampling is at unequal time intervals. It is now proposed to provide the gradient fields in discrete pulses with spaces in between at which samples can be taken. It is then straightforward to make the pulses of equal field integral or to provide an extra small pulse in one or both of the orthogonal gradients if the field integral should need adjusting before the next sample.

REFERENCES:
patent: 2700147 (1955-01-01), Tucker
patent: 3048772 (1962-08-01), Saunders et al.
patent: 3443209 (1969-05-01), Nelson et al.
patent: 4021726 (1977-05-01), Garroway
patent: 4300096 (1981-11-01), Harrison

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