High field strength magnet, preferably having remote shimming of

Details High field strength magnet, preferably having remote shimming of High field strength magnet, preferably having remote shimming of

1989-11-28

1991-09-17

Picard, Leo P.

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

Magnet structure or material

335306, H01F 100

Patent

active

050498487

ABSTRACT:
A magnet configuration particularly suited for MRI imaging in mammography is disclosed. The magnetic structure 50 has a rectangular shaped magnet with at least two parallel magnetic sources 5,6 connected by a ferromagnetic core flux path defining an air gap for imaging. A remote shimming C-shaped magnetic source is preferably used to decrease the front edge fringe effect of the magnetic structure 50 to create a relatively homogeneous field in the air gap beginning at the front edge for effective imaging.

REFERENCES:
patent: 3898599 (1975-08-01), Reid et al.
patent: 4679022 (1987-07-01), Miyamoto et al.

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