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This article discusses a fundamental issues of medical ontology based on ontological theory. We focus on "anatomical structure of organs" and "abnormal states in the human body". On the basis of the investigation, we distinguish organ-specific types from those independent of any organ to maximize the explicitness of ontology. The next feature of our(More)
This article discusses the ontological treatment of diseases in the framework of the Ontology for General Medical Science (OGMS). We aim to provide a definition of a disease that is more friendly to clinicians and propose a corresponding model of diseases. We define a disease as a dependent continuant constituted of one or more causal chains of clinical(More)
In order to realize sophisticated medical information systems, many medical ontologies have been developed. We proposed a definition of disease based on River Flow Model which captures a disease as a causal chain of clinical disorders. We also developed a disease ontology based on the model. It includes definitions of more than 6,000 diseases with 17,000(More)
in the Medical Domain Yuki Yamagata*, Hiroko Kou*, Kouji Kozaki*, Riichiro Mizoguchi*, Takeshi Imai and Kazuhiko Ohe 1 ISIR, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka, Japan 2 Research Center for Service Science School of Knowledge Science, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa, Japan 3 Department of Medical(More)
Exchanging huge volumes of data is a common concern in various fields. One issue has been the difficulty of cross-domain sharing of knowledge because of its highly heterogeneous nature. We constructed an ontological model of abnormal states from the generic to domain-specific level. We propose a unified form to describe an abnormal state as a "property",(More)
We have been building a Japanese medical ontology that provides an intelligent infrastructure for systematization and synthetic understanding of medical knowledge on a large scale. The objectives of our research include building a medical ontology and developing application systems based on it. We identified a few common fundamental technologies for(More)
To prefetch images in a hospital-wide picture archiving and communication system (PACS), a rule must be devised to permit accurate selection of examinations in which a patient's images are stored. We developed an inductive method to compose prefetch rules from practical data which were obtained in a hospital using a decision tree algorithm. Our methods were(More)
A multi-institutional Radiation Oncology Greater Area Database (ROGAD) was started in 1991 under the direction of the Japanese Society for Therapeutic Radiology and Oncology (JASTRO). Use of ROGAD was intended to allow reflection of results of data analysis into treatment strategy and treatment planning for individual cases, to provide quality assurance, to(More)
This article discusses an ontology-handling technology to provide on-demand reorganization of is-a hierarchy of diseases instead of one fixed hierarchy to cope with various viewpoints which physicians might have. It is one of the important benefits of our medical ontology which is developed as a Japanese national project. This technology tackles with the(More)