Fast method and device for determining an NMR distribution in a

Details Fast method and device for determining an NMR distribution in a Fast method and device for determining an NMR distribution in a

1987-12-22

1989-03-14

Tokar, Michael J.

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

324307, G01R 3320

Patent

active

048127620

ABSTRACT:
The invention relates to a method of making NMR images (density distributions, location-dependent spectroscopy) utilizing two alternating gradient fields whose gradient directions are mutually perpendicular. Thus, a two-dimensional "plane" in the 3-D image frequency space can be filled with a uniform density of measurement points. Per FID signal more signal samples can be taken, resulting in a substantial reduction of the entire measurement procedure for a 3-D image. This method is very suitable for imaging of 3-D density distributions, 2-D or 3-D spectroscopy etc. The periods and the amplitudes of the alternating gradient fields are preferably the same; however, these fields are preferably phase-shifted 90.degree. with respect to one another.

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M. M. Tropper, Image Reconstruction . . . Acquisition, J. Mag. Res. 42, (1981) pp. 193-202.

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