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US 5,706,575 AGranted
Method of making eddy current-less pole tips for MRI magnets
AssigneeThe Regents of the University of California
InventorsLeon Kaufman, Joseph W. Carlson
Life of this patent
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Abstract
Static magnet pole tips for a MRI system in which the static magnet pole tips are cut from a slug of spirally wound ferromagnetic material. The static magnet pole tips are cut from the spirally wound slug such that the static magnet pole tips have no or few semi-closed loops of ferromagnetic material. The static magnet pole tips can be used individually, or can be stacked for strength and symmetry.
Claims6
A method of manufacturing a static magnet pole tip of a predetermined size for an MRI system, comprising the steps of:
- 1) winding ferromagnetic tape into a spiral slug of electrically insulated layers having a slug size larger than the predetermined size of the static magnet pole tip;
- and
- 2) cutting the static magnet pole tip from the spiral slug, whereby the approximate center of the static magnet pole tip is apart front the approximate center of the spiral slug.
Dependencies are inferred from the claim text.