1. An image judging apparatus, comprising: a candidate region extracting means for extracting candidate regions for predetermined patterns from medical image data; an inner/outer outline image extracting means for extracting inner/outer outline images, which are in the vicinity of the outline of the candidate regions extracted by the candidate region extracting means; and a pattern judging means for judging the type of pattern within the candidate regions, by employing characteristic amounts of the inner/outer outline image extracted by the inner/outer outline image extracting means.