Magnetic resonance diagnosing apparatus

Details Magnetic resonance diagnosing apparatus Magnetic resonance diagnosing apparatus

1991-04-02

1992-12-08

Tokar, Michael J.

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

324309, G01R 3320

Patent

active

051701219

ABSTRACT:
A magnetic resonance diagnosing apparatus has a static magnetic field magnet, a gradient magnetic field coil, a transmitter/receiver probe, a Fourier transformer, a discriminator, a DC offset changer, and a controller. The Fourier transformer transforms a time-region magnetic resonance signal acquired by the transmitter/receiver probe to a frequency-region signal in accordance with Fourier transformation. The discriminator discriminates whether the line width of the frequency-region magnetic resonance signal is not more than a predetermined value. Based on the line width of the frequency-region magnetic resonance signal, the direct current offset changer adjusts the current to be supplied at least to the gradient magnetic field coil so as to correct the offset of the static magnetic field.

REFERENCES:
patent: 3873909 (1975-03-01), Ernst
patent: 4684893 (1987-08-01), Kojima
patent: 4701707 (1987-10-01), Riedl
patent: 5079503 (1992-01-01), Siebold et al.

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