Nuclear magnetic resonance systems

Details Nuclear magnetic resonance systems Nuclear magnetic resonance systems

1981-12-14

1984-06-12

Tokar, Michael J.

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

324313, G01R 3308

Patent

active

044544740

ABSTRACT:
A method of examining a slice of a body by nuclear magnetic resonance in which a steady magnetic field, and a gradient field G.sub.z along the same axis define the slice to be examined. A periodic magnetic field H.sub.1 at the Larmor frequency for the slice is applied in two distinct pulses 1, 2 each in conjunction with the gradient field. The total field integral of the two pulses is chosen to be sufficient to rotate spin vectors of nuclei in the field through an angle of .pi./2 radians. Between the two pulses 1, 2, a further pulse 3 is applied in the absence of the gradient field G.sub.z, which has a field integral sufficient to rotate the spin vectors through an angle of .pi. radians.

REFERENCES:
patent: 4284948 (1981-08-01), Young
patent: 4297637 (1981-10-01), Crooks
patent: 4339716 (1982-07-01), Young

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