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Integral passive shim system for a magnetic resonance apparatus

  • US 6,897,750 B2
  • Filed: 03/29/2002
  • Issued: 05/24/2005
  • Est. Priority Date: 04/03/2001
  • Status: Active Grant
First Claim
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1. A device for adjusting a spatial dependence of a magnetic field in a working volume of a main field magnet using ferromagnetic field shaping elements, the device comprising:

  • at least one ferromagnetic toil or sheet metal having openings, said openings having shapes, positions and sizes selected such that a shape and amount of ferromagnetic material remaining in said foil or sheet metal shims the magnetic field in the working volume of the main field magnet, wherein said foil or sheet metal Is self-supporting and surrounds the working volume of the main field magnet.

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