Magnetic field generating device for NMR-CT

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

1987-09-25

1988-10-11

Harris, George

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

Magnet structure or material

324318, H01F 702

Patent

active

047774649

ABSTRACT:
A magnetic field generating device for the NMR-CT comprises a pair of opposing permanent magnet segments magnetically coupled by a yoke which define therebetween an air gap where a magnetic field is created. Each segment has a pole piece attached to its gap-facing surface. Each segment is composed of a ferrite magnet and a rare earth magnet, one of the two magnets being disposed in the central portion of the segment and the other disposed around the one magnet. The thickness of the ferrite magnet in the direction of attaching it to the yoke is larger than that of the rare earth magnet.

REFERENCES:
patent: 4647887 (1987-03-01), Leupold
patent: 4654618 (1987-03-01), Leupold
patent: 4675609 (1987-06-01), Danby et al.

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