Shim coil for nuclear magnetic resonance imaging apparatus

Details Shim coil for nuclear magnetic resonance imaging apparatus Shim coil for nuclear magnetic resonance imaging apparatus

1989-01-03

1990-03-06

Tokar, Michael J.

Electricity: measuring and testing

Particle precession resonance

Spectrometer components

324322, G01R 3320

Patent

active

049069349

ABSTRACT:
A shim coil for a nuclear magnetic resonance imaging apparatus capable of being independent of influences from time varying magnetic fields generated by gradient coil. The shim coil includes primary coil for producing an extra magnetic field in accordance with a direct current to be supplied, and compensatory coil for producing a compensatory magnetic field which cancels a magnetic field produced by the primary coil means in response to an induced current due to the time varying gradient magnetic fields.

REFERENCES:
patent: 3582779 (1977-06-01), Bloom
patent: 4633179 (1986-12-01), Sugimoto
patent: 4791370 (1988-12-01), MacKinnon

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