Magnetic field generation device for use in superconductive type

Details Magnetic field generation device for use in superconductive type Magnetic field generation device for use in superconductive type

1993-07-30

1995-01-24

Wieder, Kenneth A.

Electricity: measuring and testing

Particle precession resonance

Spectrometer components

324318, 335299, G01R 3320

Patent

active

053845382

ABSTRACT:
An improved magnetic field generating device for use with a medical nuclear magnetic resonance tomographic device (MRI). The device comprises a magnetic circuit formed of a pair of magnetic pole pieces connected by yoke members in opposite relationship with each other leaving a space sufficient to accommodate therebetween an object receiving a medical inspection. According to the present invention, a super-conductive coil is wound around one of the pairs of magnetic pole pieces and the dimensional relationship between the two magnetic pole pieces is varied in a variety of ways to reduce the magnetic field imbalance, with the advantages that the magnetic flux distribution becomes highly uniform throughout the space between the pair of magnetic pole pieces, the patient entering the space has no oppressive sensation and the manufacturing cost can be reduced to a considerable degree.

REFERENCES:
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patent: 4777464 (1988-10-01), Takabatashi et al.
patent: 4827235 (1989-05-01), Inomata et al.
patent: 5134374 (1992-07-01), Breneman et al.

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