Magnetostatic field generator for magnetic resonance imaging app

Details Magnetostatic field generator for magnetic resonance imaging app Magnetostatic field generator for magnetic resonance imaging app

1992-12-02

1994-08-02

Picard, Leo P.

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

Magnet structure or material

H01F 702

Patent

active

053349660

ABSTRACT:
A magnetostatic field generator for a magnetic resonance imaging apparatus includes a pair of permanent magnets each having a rectangular parallelepiped shape arranged perpendicular to a direction of a uniform magnetic field to surround a space where a uniform magnetic field is generated, a plurality of first permanent magnets each having a trigonal prism shape arranged on both sides of an area between the permanent magnets each having a rectangular parallelepiped shape, a plurality of second permanent magnets each having a trigonal prism shape which are arranged between the permanent magnets each having a rectangular parallelepiped shape and the first permanent magnets and satisfy magnetic field boundary conditions between the permanent magnets each having a rectangular parallelepiped shape and the first permanent magnets, and a yoke for holding the pair of permanent magnets each having a rectangular parallelepiped shape, the plurality of first permanent magnets, and the plurality of second permanent magnets and for forming a magnetic path.

REFERENCES:
patent: 4695802 (1987-09-01), Zijlstra
patent: 4810986 (1989-03-01), Leupold
patent: 4953555 (1990-09-01), Leupold et al.
patent: 5107239 (1992-04-01), Abele
patent: 5162770 (1992-11-01), Abele
patent: 5162771 (1992-11-01), Abele

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