Rapid-scan NMR angiography

Details Rapid-scan NMR angiography Rapid-scan NMR angiography

1987-04-06

1989-01-31

Smith, Ruth S.

Surgery

Truss

Pad

324306, 324309, A61B 505

Patent

active

048008893

ABSTRACT:
A method for providing a nuclear magnetic resonance (NMR) angiographic image substantially only of moving spins associated with fluid flow in a living organism sample having a cardiac cycle at a cardiac rate, and immersed in a main static magnetic field, commences by nutating the spins by a preselected amount .alpha. less than 90.degree., in the initial part of each of a pair of imaging sequences. The repetition time interval T.sub.R between sequential nutations occurs at a rate greater than the cardiac rate. After each nutation, a pair of alternating-polarity flow-encoding signal pulses are generated in a first magnetic field gradient impressed upon the sample, with each of the flow-encoding pulses in the first sequence of each pair having a polarity opposite to the polarity of the like-positioned flow-encoding pulse in the second sequence of each pair. The NMR response echo signal is acquired and the difference in the data from the pair of sequences is used to display at least one projection angiographic image.

REFERENCES:
patent: 4587489 (1986-05-01), Wehrli
patent: 4667159 (1987-05-01), Hodsoll, Jr. et al.
patent: 4710717 (1987-12-01), Pelc et al.
patent: 4714081 (1987-12-01), Dumoulin et al.

Affiliated with

Also associated with

Rating

Rapid-scan NMR angiography does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Rapid-scan NMR angiography, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rapid-scan NMR angiography will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-172969