Method for magnetic field gradient eddy current compensation

Details Method for magnetic field gradient eddy current compensation Method for magnetic field gradient eddy current compensation

1986-01-03

1987-10-06

Tokar, Michael J.

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

324318, G01R 3320

Patent

active

046985913

ABSTRACT:
A method is provided for characterizing the spurious, time-dependent magnetic field gradient response and for compensating therefor. In accordance with the method a small sample object is placed away from the system isocenter where the gradient to be compensated is non-zero. A magnetic field gradient pulse is applied to the sample, followed by the application after a variable time of a 90.degree. radio frequency pulse. The phase of the resulting free induction decay (FID) signal is monitored as a function of total time since the end of the gradient pulse. These data are related to the gradient impulse response and are fit to a set of (e.g., two or three) exponentials by regression techniques wherein an initial estimate is improved in one embodiment by chi-squared minimization of a Taylor's series expansion about the initial estimate point.

REFERENCES:
patent: 4585995 (1986-04-01), Flugan
patent: 4590428 (1986-05-01), Muller
patent: 4631481 (1986-12-01), Young et al.

Affiliated with

Also associated with

Rating

Method for magnetic field gradient eddy current compensation does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for magnetic field gradient eddy current compensation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for magnetic field gradient eddy current compensation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2120007