Method for the selective excitation of a volume in an object

Details Method for the selective excitation of a volume in an object Method for the selective excitation of a volume in an object

1986-08-07

1987-12-08

Levy, Stewart J.

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

G01R 3320

Patent

active

047120665

ABSTRACT:
Using the method in accordance with the invention a layer of an object is selected by means of a cycle comprising a non-selective 90.degree. pulse, a dephasing gradient magnetic field, a non-selective 180.degree. pulse and a selective 90.degree. pulse in the presence of a similar gradient field. In the layer, a magnetization in the z-direction is obtained. Outside the object layer the transverse magnetization is totally dephased. By executing the cycle three times, during which the gradient directions of the three gradient fields used are mutually orthogonal, a "cube-like" volume is selected. High-resolution images of spin density distributions and T1 or T2 distributions can thus be realized and location-dependent spectroscopy is also possible.

REFERENCES:
patent: 4431968 (1984-02-01), Edelstein et al.
patent: 4613949 (1986-09-01), Glover et al.

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