Apparatus for indirect measurement and control of a magnetic gra

Details Apparatus for indirect measurement and control of a magnetic gra Apparatus for indirect measurement and control of a magnetic gra

1991-06-12

1993-08-17

Tokar, Michael J.

Electricity: measuring and testing

Particle precession resonance

Spectrometer components

324318, G01R 3320

Patent

active

052372774

ABSTRACT:
A nuclear magnetic resonance imaging system has a power supply with a regulator for a gradient coil, the gradient coil generating a gradient magnetic field. Circuitry is provided for measuring changes in the flux density of the gradient magnetic field, and forming an actual value of the flux density from those measurements. The actual value is compared to a predetermined value, and the gradient field is regulated so that the flux density corresponds to the predetermined value.

REFERENCES:
patent: 4437053 (1984-03-01), Bax
patent: 4703275 (1987-10-01), Holland
patent: 4864241 (1989-09-01), Goldie
patent: 4928063 (1990-05-01), Lampman et al.
patent: 5150055 (1992-09-01), Kimura et al.
"Grundshaltungen", Beath et al., Electronik 3 pp. 335-354.

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