Method and apparatus for B.sub.0 eddy current compensation by B.

Details Method and apparatus for B.sub.0 eddy current compensation by B. Method and apparatus for B.sub.0 eddy current compensation by B.

1996-12-23

1999-01-05

Arana, Louis M.

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

324314, G01V 300

Patent

active

058567445

ABSTRACT:
In accordance with the invention, spatially invariant B.sub.0 eddy currents induced by a slice-selection gradient, G.sub.Z in an MRI system, are compensated by phase modulating the RF excitation pulse with a compensating function. In one embodiment, the compensating function is based on a measure of the integral of the B.sub.0 eddy current. In another embodiment, a scaled copy of the excitation gradient can be used as an approximation of the compensating function.

REFERENCES:
patent: 5289127 (1994-02-01), Doddrell et al.
patent: 5296809 (1994-03-01), Roberts et al.

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