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Activation time maps for (a) the known solution and inverse solutions using 204 electrodes using (b) the Greensite-Tikhonov or (c) the Tikhonov method and using 84 electrodes with (d) the Greensite-Tikhonov or (e) the Tikhonov method. In all cases, the body surface signals had been corrupted by 10% Gaussian noise and the waves propagated from the pacemaker region (red/yellow area) towards the pylorus (blue area).
