Magnet arrangement for an NMR tomography system, in particular f

Details Magnet arrangement for an NMR tomography system, in particular f Magnet arrangement for an NMR tomography system, in particular f

1997-05-15

1999-09-28

Arana, Louis

Electricity: measuring and testing

Particle precession resonance

Spectrometer components

324319, G01V 300

Patent

active

059594543

ABSTRACT:
Magnet arrangement for a one-sided NMR tomography system having a permanent magnetic ring (4) of an outer radius R.sub.a and an inner radius R.sub.i and being magnetized axially in the direction of the z-axis and extending in the axial direction up to a plane E (z=z.sub.E) for generating a homogeneous magnetic field B in a measuring volume (2) is characterized in that, in a radial region R<R.sub.i, at least one further permanent magnetic field-generating element, which is rotationally symmetric, is arranged with respect to the plane E on the same side as the permanent magnetic ring (4) at an axial distance from plane E, whereby a depression V is formed on the surface of the magnet arrangement (1) facing plane E and that the permanent magnetic field-generating elements generate at least 90%, preferably 99% of the homogeneous magnetic field B in the measuring volume (2). In this manner, NMR examinations of the skin or other regions which are close to the surface can be carried out in a particularly easy manner.

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Patents Abstracts of Japan, C-862, Aug. 27, 1991 vol. 15/No. 337 Sumitomo Special Metals Co. Ltd.: "Equipment for Generating . . . ".

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