Electricity: measuring and testing – Particle precession resonance – Determine fluid flow rate
Patent
1989-04-28
1990-09-04
Tokar, Michael J.
Electricity: measuring and testing
Particle precession resonance
Determine fluid flow rate
128653AF, G01R 3320
Patent
active
049547798
ABSTRACT:
A system corrects for phase angles degradation due, for example to eddy currents, and uses the corrected phase angles to determine flow. The system acquires flow compensated low resolution images and uncompensated low and normal resolution images of a flowing fluid. The images include phase angle data. The phase angle data of the low resolution images are subtracted from the corresponding phase angle data of the normal resolution images to obtain phase angle corrected compensated and uncompensated images. The phase angle corrected compensated images are subtracted from the phase angle corrected uncompensated images to obtain flow images with minimized phase angle distortion. Reliable and accurate flow velocity for each pixel is thereby obtained using the minimized phase angle distortion flow images.
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patent: 4683431 (1987-07-01), Pattany et al.
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C. L. Dumoulin et al. "Multiecho Magnetic Resonance Angiography", Mag. Res. in Med. vol. 5, pp. 47-57 (1987).
MR Research Note; Selected Abstracts submitted to the 6th SMRM, 1987, by Philips Medical Systems; p. 16.
E. L. Hahn, Journal of Geophysical Research vol. 65, No. 2, pp. 776-777.
Elscint Ltd.
O'Shea Kevin D.
Tokar Michael J.
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