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. Author manuscript; available in PMC: 2014 Jun 1.
Published in final edited form as: Physiol Meas. 2013 May 29;34(6):595–608. doi: 10.1088/0967-3334/34/6/595
Algorithm 1: Producing the optimal current patterns
Input: orthonormal current matrix: T, conductivity estimate ρ(0)
Initialize T̂= T;
repeat

  1. Apply T̂ and measure voltages V;

  2. Apply T̂ and compute the predicted voltages U(ρ(0));

  3. Form the voltage difference matrix D = V − U(ρ(0)) and P = D*D;

  4. Perform eigenvalue decomposition of P and form the eigenvector matrix E so that their corresponding eigenvalues are sorted in descending order;

  5. T̂ = T̂E;

  6. until

  7. the current pattern converges;

  8. Output: Optimal current matrix: T̂