1. A medical image judging apparatus, comprising: memory means, for recording a medical image that includes an image of a predetermined diagnostic region, which is a target of diagnosis, therein; structural element extracting means, for extracting at least one anatomical structure from within the medical image; judging means, for judging whether the diagnostic region within the medical image is appropriate for conducting diagnosis, with the extracted structural element as a reference; and judgment result output means, for outputting the judgment results obtained by the judging means.