Electricity: measuring and testing – Particle precession resonance – Determine fluid flow rate
Patent
1992-03-19
1994-01-18
Tokar, Michael J.
Electricity: measuring and testing
Particle precession resonance
Determine fluid flow rate
324309, G01R 3320
Patent
active
052802442
ABSTRACT:
Image artifacts caused by flowing spins during a fast spin echo pulse sequence are suppressed by employing gradient moment nulling. The first moment of one or more gradients is nulled at each RF refocusing pulse in the sequence, and in alternative embodiments, the first moment is also nulled at each acquired NMR echo signal.
REFERENCES:
patent: 4706026 (1987-11-01), Pelc et al.
patent: 4731583 (1988-03-01), Glover et al.
patent: 4970465 (1990-11-01), Hagiwara
patent: 4973906 (1990-11-01), Bernstein
patent: 4978918 (1990-12-01), Sakamoto
patent: 5142231 (1992-08-01), Jensen et al.
patent: 5170122 (1992-12-01), Bernstein
A Progressive Gradient Moment Nulling Design Technique, J. G. Pipe & T. L. Chenevert, Mag. Resonance in Medicine, May 1991, No. 1, pp. 175-179.
Reduction of Flow Artifacts in Fast Gradient-Recalled Echo Imaging by the Use of Prefocused Pulses, A. R. C. Gates, et al., Journ. of Mag. Res., Jan. 1992, No. 1, pp. 222-228.
Flow-Velocity Imaging from Linear Regression of Phase Images with Techniques for Reducing Eddy-Current Effects, Journal of Magnetic. Res., Oct. 1990, No. 1, pp. 71-89.
General Electric Company
Tokar Michael J.
LandOfFree
Gradient moment nulling in a fast spin echo NMR pulse sequence does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Gradient moment nulling in a fast spin echo NMR pulse sequence, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gradient moment nulling in a fast spin echo NMR pulse sequence will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1138584