Depth and refocusing pulses for use with inhomogeneous radiofreq

Details Depth and refocusing pulses for use with inhomogeneous radiofreq Depth and refocusing pulses for use with inhomogeneous radiofreq

1985-09-13

1988-05-03

Levy, Stewart J.

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

324314, G01R 3320

Patent

active

047423030

ABSTRACT:
In a pulsed nuclear magnetic resonance method of analysis, a series of phase cycled radiofrequency pulses of the form 2.theta.; .theta[+-.x]; (2.theta[+-.,.+-.y]).sub.4, called a depth pulse scheme, may be applied using an irradiation coil which provides an inhomogeneous radiofrequency field across the sample volume, so that signals may only be detected from sample regions where the pulse angle .theta. is close to m.pi./2, where m is an odd integer. However, signals from regions where .theta.=3.pi./2 or 5.pi./2, if such regions exist, can be eliminated by varying some of the pulses from their ideal .theta. of 2.theta. values. The sample discrimination afforded by means of these pulse schemes may be improved by using static or pulsed magnetic field gradients or by using more than one radiofrequency coil.

REFERENCES:
patent: 4443760 (1984-04-01), Edelstein et al.
patent: 4449097 (1984-05-01), Young et al.
patent: 4471305 (1984-09-01), Crooks et al.
patent: 4486709 (1984-12-01), Bendall

Affiliated with

Also associated with

Rating

Depth and refocusing pulses for use with inhomogeneous radiofreq does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Depth and refocusing pulses for use with inhomogeneous radiofreq, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Depth and refocusing pulses for use with inhomogeneous radiofreq will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1508837