Magnetic field correction device

Details Magnetic field correction device Magnetic field correction device

1992-05-22

1993-08-17

Arana, Louis

Electricity: measuring and testing

Particle precession resonance

Spectrometer components

324319, G01V 300

Patent

active

052372758

ABSTRACT:
A magnetic field correction device for enhancing the homogeneity of a magnetic field generated by a magnet of a magnetic resonance imaging device. The correction device includes a plurality of magnetic shim holders disposed at predetermined circumferential angles on a support cylinder coaxial with the magnet. Each shim holder accommodates a magnetic shim element consisting of a first and a second magnetic bar member of distinct lengths and a first and a second non-magnetic tube for accommodating the first and second magnetic bar members therein. The members are positioned by respective stoppers inserted into the tubes.

REFERENCES:
patent: 4639673 (1987-01-01), Zijlstra
patent: 4743853 (1988-05-01), Frese
patent: 4803433 (1989-02-01), McBride
patent: 4990877 (1991-02-01), Benesch
patent: 5047720 (1991-09-01), Guy

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