Abstract
A reporting system which assists radiologists reporting on medical images and calculates alternatives of probable diseases was developed with proven applicability for CT and ultrasonography. The diagnostic information found by radiologists in various types of images is managed as a database in the reporting system and is also transferred to a medical record database, the HIS (Hospital Information System) of Hokkaido University Hospital. The reporting system supports both data conversion and transfer to the host computer of the HIS. The system has processed about 20 000 reports over the last 5 years. Here we present the efficiency of producing reports, the structure of the database, and the hit ratio of calculated diagnoses in this system.