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Structured coil electromagnets for magnetic resonance imaging and method for fabricating the same

  • US 5,382,904 A
  • Filed: 08/06/1992
  • Issued: 01/17/1995
  • Est. Priority Date: 04/15/1992
  • Status: Expired due to Term
First Claim
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1. A method of fabricating an electromagnet, comprising the steps of:

  • defining a volume of interest;

    selecting a magnetic field magnitude to be produced in said volume of interest;

    defining a region near said volume of interest within which non-zero zero current density is allowable, and represented as a two-dimensional array of elemental areas;

    determining the magnitude and polarity of the current density for each of the elemental areas within the defined region in order to produce the selected magnetic field magnitude in the volume of interest, in such a manner that substantially the same magnitude and polarity of current density is determined for at least one cluster of elemental areas; and

    constructing at least one coil for carrying current at locations and at magnitudes corresponding to the result of the determining step.

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