Method for the compensation of eddy currents caused by gradients

Details Method for the compensation of eddy currents caused by gradients Method for the compensation of eddy currents caused by gradients

1994-04-12

1995-09-19

Arana, Louis M.

Electricity: measuring and testing

Particle precession resonance

Spectrometer components

324312, G01V 300

Patent

active

054518776

ABSTRACT:
In a method for the compensation of eddy currents caused by gradients in nuclear magnetic resonance apparatus a gradient pulse is activated and a nuclear magnetic resonance signal is excited in a slice of a spatially extended phantom, the nuclear magnetic resonance signal is acquired after the end of the gradient pulse and during the decay time of the eddy currents caused by said gradient pulse and the eddy current magnetic field is identified from the phase curve of this nuclear magnetic resonance signal. A filter for the gradient system that generates the gradient pulse is calculated on the basis of the eddy current magnetic field identified in this way.

REFERENCES:
patent: 4284950 (1981-08-01), Burl et al.
patent: 4585995 (1986-04-01), Flugan
patent: 4698591 (1987-10-01), Glover et al.
patent: 4703275 (1987-10-01), Holland
patent: 4749948 (1988-06-01), Duby et al.
patent: 4910460 (1990-03-01), Sebok
"NMR Imaging Techniques and Applications: A Review", Rev. Sci. Instrum., 53(9), 1982, pp. 1319-1337.

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