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Three-dimensional impedance imaging process

  • US 5,351,697 A
  • Filed: 09/29/1993
  • Issued: 10/04/1994
  • Est. Priority Date: 12/16/1991
  • Status: Expired due to Term
First Claim
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1. A method for electrical impedance imaging by obtaining and using sets of current patterns for three-dimensionally imaging the interior of a body having an internal resistivity using electrical impedance tomography, the method comprising:

  • providing a multidimensional array of electrodes arranged in a plurality of groups for an impedance imaging system;

    establishing a linearly independent set of current patterns for forming a basis for each group;

    adjoining a constant pattern to each basis for forming an augmented basis for each group;

    taking the tensor product of the augmented bases for forming a tensor product basis for each group;

    removing the constant pattern from the tensor product basis for establishing a basis of current patterns for being applied to the array of electrodes;

    applying the current patterns to the electrodes to form voltage patterns at the electrodes; and

    measuring the voltage patterns to create an electrical impedance image of the body.

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