Electricity: measuring and testing – Particle precession resonance – Using a nuclear resonance spectrometer system
Patent
1997-03-27
1999-12-07
Barlow, John
Electricity: measuring and testing
Particle precession resonance
Using a nuclear resonance spectrometer system
324307, G01V 300
Patent
active
059989963
ABSTRACT:
A method is presented for correcting Maxwell term error artifacts produced by an NMR system during the production of either a phase contrast angiogram or a complex difference angiogram. Phase corrections are made to the reconstructed phase image to eliminate the artifacts. Correction coefficients calculated from the flow encoding magnetic gradient waveforms of the phase contrast pulse sequence are used in a polynomial to calculate a set of phase error corrections. These corrections are then used to adjust the phase at each pixel of the angiogram image.
REFERENCES:
patent: 4591789 (1986-05-01), Glover et al.
patent: 4698591 (1987-10-01), Glover et al.
patent: 4870361 (1989-09-01), Kleef et al.
patent: 4950994 (1990-08-01), Glover et al.
patent: 5226418 (1993-07-01), Bernstein et al.
Minimizing TE in Moment-nulled or Flow-encoded Two-and Three-dimensional Gradient-Echo Imaging, JMRI, vol. 2, No. 5, pp. 583-588, Sep. 1992, Bernstein, et al.
Bernstein Matthew A.
Ganin Alexander
Glover Gary H.
King Kevin F.
Pelc Norbert J.
Barlow John
General Electric Company
LaViolette Paul A.
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