Rapid flow measurement using an NMR imaging system

Details Rapid flow measurement using an NMR imaging system Rapid flow measurement using an NMR imaging system

1990-08-09

1992-03-31

Tokar, Michael J.

Electricity: measuring and testing

Particle precession resonance

Determine fluid flow rate

324300, G01R 3320

Patent

active

051011565

ABSTRACT:
An NMR system measures the velocity of flowing spins in the presence of stationary spins by performing three separate measurement cycles. The first cycle is a reference, the second cycle includes a magnetic field gradient having an incremental, flow sensitizing first moment .DELTA.M.sub.1, and a third measurement cycle includes a magnetic field gradient having an incremental flow sensitizing first moment -.DELTA.M.sub.1. The resulting NMR signals are processed to produce a velocity measurement.

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