Process for the modulation of the speed effect of moving parts o

Details Process for the modulation of the speed effect of moving parts o Process for the modulation of the speed effect of moving parts o

1985-12-12

1987-09-15

Levy, Stewart J.

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

128653, G01R 3320

Patent

active

046942530

ABSTRACT:
The present invention relates to a process for modulating the effect of the speed of the moving parts of a body. The machines or processes for measuring the density by nuclear magnetic resonance are too sensitive at the displacement speed of the parts in question. In the invention, the sensitivity of the machines or processes is reduced in such a way that the speed effect can be measured. Prior to the measurement, compensating magnetic field sequences are applied in order to counteract the effect produced by the interfering magnetic field sequences, which are necessary for performing the measurement.

REFERENCES:
patent: 4595879 (1986-06-01), Lent et al.
patent: 4609872 (1986-09-01), O'Donnell
patent: 4616180 (1986-10-01), Compton
Radiology, vol. 154, No. 2, Feb. 1985, pp. 433-441, Easton, U.S.; P. R. Moran et al.: "Verification and Evaluation of Internal Flow and Motion", *Chapter: Method, pp 434-435.
Physics in Medicine & Biology, vol. 29, No. 7, Jul. 1984, pp. 891-895, The Institute of Physics, Bristol, GB; T. W. Redpath et al.: "A New Method of NMR Flow Imaging".
Medical Physics, vol. 12, No. 1, Jan.-Feb. 1985, pp. 59-64, Am. Assoc. Phys. Med., New York, U.S.; M. O'Donnell: "NMR Blood Flow Imaging Using Multiecho, Phase Contrast Sequences" * Chapter II, Methods; FIGS. 1, 2.

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