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. Author manuscript; available in PMC: 2015 Jan 1.
Published in final edited form as: J Electrocardiol. 2013 Oct 17;47(1):20–28. doi: 10.1016/j.jelectrocard.2013.10.004

Fig. 2.

Fig. 2

Cylindrical-cage potential distribution due to a pair of parallel dipoles, 30.6 mm apart, positioned close to the surface of the cage. (a) Cylindrical cage potentials calculated directly. (b through f) Inversely computed cylindrical cage potentials using a second-order conjugate gradient iterative method (SCG), second-order Tikhonov regularization (SOT), total variation algorithm, whose gradient operator was replaced by a Laplacian operator (STV), first-order Tikhonov regularization (FOT), and first-order total variation technique (FTV), respectively. Two extrema were reconstructed clearly only by SOT and FTV. “M” denotes maximum potential and “m” denotes minimum potential.