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Enhancement of a lesion by the trained lesion-enhancement MTANN filter for a non-training case (Case B). (a) Original image of the segmented lung with a nodule (indicated by an arrow). (b) Output image of the trained lesion-enhancement MTANN filter. The nodule is enhanced, whereas most of the normal structures are suppressed. (c) Nodule candidates detected by the trained lesion-enhancement MTANN followed by thresholding. (d) Nodule candidates detected by simple thresholding only.
