Magnetic field generating device for NMR-CT

Details Magnetic field generating device for NMR-CT Magnetic field generating device for NMR-CT

1985-04-04

1987-06-09

Harris, George

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

Magnet structure or material

335298, 335300, H01F 700

Patent

active

046723463

ABSTRACT:
A magnetic field generating device for a nuclear magnetic resonance-computerized tomography comprising a pair of permanent magnets magnetized in the same direction with different-polarity poles opposing mutually to define an air gap, whose maximum energy product, (BH).sub.max, is not less than 30 MGOe (240 KJ/m.sup.3), on each of the opposing faces of the permanent magnets a magnetic pole segment being provided which has an annular projection and, as occasion demands, at least one central convex projection inside the annular projection, and the permanent magnets being coupled magnetically by a yoke to generate a magnetic field within the air gap.
The present device is able to create a uniform and stable magnetic field, in spite of its small-sized body.

REFERENCES:
patent: 2777099 (1957-01-01), Foss
patent: 4445102 (1984-04-01), Thorn et al.
patent: 4498048 (1985-02-01), Lee et al.

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