NMR detection of small amount of fast transversal relaxation...

Details NMR detection of small amount of fast transversal relaxation... NMR detection of small amount of fast transversal relaxation...

2005-04-19

2005-04-19

Shrivastav, Brij B. (Department: 2859)

Electricity: measuring and testing

Particle precession resonance

Using well logging device

C324S300000

Reexamination Certificate

active

06882147

ABSTRACT:
The present invention provides an improved NMR sequence for detecting small amount of a substance having short NMR transversal relaxation in the presence of a large amount of a substance having long NMR relaxation. A sequence of pulses enables the original z-oriented magnetization vector of a substance to experience differing reorientation effects based on the relative transverse relaxation rate of the substance. After said pulse sequence, a substance with long transverse relaxation experiences a substantial inversion of its nuclear magnetization vector, while a substance with short transverse relaxation experiences a nearly zero value of its vector. After a determinable wait time, said vectors can be shown to experience recognizably different behavior under the application of a CPMG sequence of pulses. Appropriate wait time can be determined by zeroing out spin echoes during the CPMG pulse sequence.

REFERENCES:
patent: 5519319 (1996-05-01), Smith et al.
patent: 5655531 (1997-08-01), Nishimura et al.
patent: 6091242 (2000-07-01), Hanawa
patent: 6097184 (2000-08-01), Flaum
patent: 6232778 (2001-05-01), Speier et al.
patent: 6331775 (2001-12-01), Thern et al.

Affiliated with

Also associated with

Rating

NMR detection of small amount of fast transversal relaxation... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with NMR detection of small amount of fast transversal relaxation..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and NMR detection of small amount of fast transversal relaxation... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3399352