NMR apparatus compensated for primary field changes

Details NMR apparatus compensated for primary field changes NMR apparatus compensated for primary field changes

1985-04-04

1987-08-04

Tokar, Michael J.

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

324309, G01N 2408

Patent

active

046848894

ABSTRACT:
An object which can provide a reference for measuring the intensity of a primary magnetic field, is positioned in the vicinity of a subject being examined. A variation in the primary magnetic field intensity is detected, based on a frequency shift of data observed of the object, and is used to control the primary magnetic field intensity, or reference frequency for phase detection, or to correct image data. In this manner image quality is prevented from being degraded due to the variation of the primary magnetic field intensity.

REFERENCES:
patent: 3034040 (1962-05-01), Williams
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patent: 4528510 (1985-07-01), Loeffler et al.
patent: 4585992 (1986-04-01), Maudsley et al.
Lai, C. et al., "Automatic Correction of NMR Zeugmotographic Projections," Jrnl. Phys. E. Sci. Instruments, vol. 14, 1981.
Yamamoto et al., "Inspecting Device Using Nuclear Magnetic Resonance", PTO Translation #3371 of Japanese Kokai Pat. No. Sho 58-55741.

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