ABSTRACT
A computerized system for database of radiotherapy patient and for its application was developed in 1987 and has been utilized till now. A radiotherapy planning computer (Eclipse S-14O) operated under AOS (Advanced Operating System) is the main processing unit of the system which was programmed with Fortran-5. Records of 30,000 patients can be separately registered and data of 5 courses of radiotherapy delivered to one patient can be separately registered but structurally linked together. The same environment is allowed for 60 follow-up data. Our system's utility is very convenient to use and provides simple or conditional list of records or items, periodic statistics concerning many parameters and survival or complication analysis of stored database or data manually put in. Structure, operation and several retrieval formats by data processings are reported.