Method for measuring flows in a nuclear magnetic resonance exper

Details Method for measuring flows in a nuclear magnetic resonance exper Method for measuring flows in a nuclear magnetic resonance exper

1988-05-11

1990-05-01

Tokar, Michael J.

Electricity: measuring and testing

Particle precession resonance

Determine fluid flow rate

324300, G01R 3320

Patent

active

049222023

ABSTRACT:
In a nuclear magnetic resonance experiment, the flows are measured by causing the orientation of the magnetic moments of the particles located in a slice to flip and by subsequently causing the scattering of the phases of the magnetic resonance signals to be reflected only for particles which have migrated into a slice adjacent to the slice in which the flipping has been done. It is shown that the relative dynamic range of the measured NMR signal for the moving parts in relation to the measured signal for the fixed parts becomes infinite.

REFERENCES:
patent: 4574240 (1986-03-01), Libove et al.
patent: 4602641 (1986-07-01), Feinberg
Mansfield, P. et al., "Planar Spin Imaging by NMR", J. of Mag. Res., vol. 27, pp. 101-119, No. 1, Jul. 1977.
Mansfield, P., "Multi-Planar Image Formation Using NMR Spin Echoes", Journ. of Phys. C, vol. 10, No. 3, pp. L-55-L58 (Feb. '77).
IEEE Transactions on Medical Imaging, vol. MI-5, No. 3, Sep. 1986, pp. 140-151, IEEE, New York, U.S.; D. G. Nishimura et al.; "Magnetic resonance angiography".

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