| Budget Amount *help |
¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 1997: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1996: ¥1,700,000 (Direct Cost: ¥1,700,000)
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| Research Abstract |
Radiologists performed radiographic differential diagnosis from qualitative features in radiogram. For this kind of diagnosis, computer-aided diagnostic (CAD) system is watched as one of an engineering approach. Dentigerous cyst, odontogenic keratocyst and ameloblastoma in maxillofacial region occur frequently, but their recuperations are different. Then it is necessary to make an exact differential diagnosis, although their symptoms are similar to one another. As a pilot study, we investigated statistical methods using a logistic regression and neural network. Under these studies, Kodera presented as "Differential diagnosis by neural network and statistical analysis in oral radiology" in the 12th Annual Meeting Japanese Association of Medical Physics in July 1995. And, Ohtani presented as "Radiographic differential diagnosis among dentigerous cyst, odontogenic keratocyst and ameloblatoma using statistical methods and neural network" in the 36th Japanese Society for Oral and Maxillofacial Radiology Annual meeting in September 1995. Based on these results, in 1996, we constructed the system and accumulated data. Kodera presented as "Radiographic differential diagnosis in dental region using expert system" in the 37th Japanese Society for Oral and Maxillofacial Radiology Annual meeting in September 1996. Finally, we evaluated clinically the developed system in Hiroshima University, namely dentists evaluated and confirmed the effectiveness of these methods. The method proposed in this study was applied to the other area in dental images.
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