Nuclear magnetic resonance systems

Details Nuclear magnetic resonance systems Nuclear magnetic resonance systems

1980-07-29

1982-10-19

Tokar, Michael J.

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

G01N 2700

Patent

active

043552820

ABSTRACT:
The invention is related to the so-called "echo-planar" method of NMR imaging. In that method a resonance is first excited in a slice and then two orthogonal gradients provided dispersion in the slice. One gradient is pulsed to space the frequencies of spins in adjacent strips allowing the other gradient to provide dispersion down the strips. It is now proposed to pulse the second gradient so that the dephasing down each strip is also in steps. The FID signals (including rephasing signals) for each distinct element so produced can then be put in an array and two-dimensionally Fourier transformed to yield the desired output for each element.

REFERENCES:
patent: 4115730 (1978-09-01), Mansfield
patent: 4290019 (1981-09-01), Hutchison

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