[Computer system in radiotherapy].

Computer systematized radiotherapy is useful for; The use of diagnostic images for treatment planning; The accuracy of dose distribution; The automatic control of therapy machine; The statistical analysis of patients' documentation. Computer use for radiotherapy has been worked since 1969 in Japan. Radiotherapy documentation should be carried out to be able to judge the effect of the treatment given. A large number of patients are required to obtain a good judgement. Standardization of radiotherapy patient registration and data analysis of the treatment results co-related with radiation injury are described.