Generating diagnostic rules based on rough-contrast approach

Without a correct diagnosis, a correct treatment may not be made in medical science. Not confirmed diagnosis, misdiagnosis and missed diagnosis usually happen in medical diagnosis. In the paper, some concepts such as rough exclusive, rough contrast and so on are introduced. And a method of generating diagnostic rules from clinical databases, based on these concepts, is put forward. It was proved to be feasible and effective after tested with a database, and a good proposal, which could diagnose the disease in accordance with diagnostic needs.