Patent ID: 8320654
Filing Date: 2012-11-27
Classification: A61B,G06T

Abstract:
1. A bone mineral density evaluation system for evaluating a bone mineral density from an X-ray picture of a mandible, said X-ray picture containing a picture of an artificial reference specimen disposed beside a picture of said mandible, said X-ray picture resulting from x-raying said artificial reference specimen disposed in such a position that said picture of said artificial reference specimen is positioned beside said picture of said mandible in said X-ray picture, said system comprising: detecting means for detecting a brightness of a particular portion of said picture of said artificial reference specimen; correcting means for correcting the brightness of said X-ray picture so as to make the brightness of said particular portion of said picture of said artificial reference specimen as detected by said detecting means equal to a preset standard value; and evaluating means for evaluating the bone mineral density on the basis of the corrected brightness of said X-ray picture as corrected by said correcting means; said evaluating means making evaluation on the basis of the corrected brightness of a particular region of said picture of said mandible in said X-ray picture; said particular region including a region corresponding to an alveolar bone portion around a first premolar.