RADIOTHERAPEUTIC INTERVAL — the distinction in initial radio sensitivity of a tumor and surrounding normal fabrics used at radiation therapy of malignant new growths. Size P. and. depends on a complex of the factors defining processes of beam damages and a reparation of cells. The directed R.'s change and. by selective strengthening of radiation injury of a tumor and (or) preferential protection of surrounding fabrics by means of chemical, physical and other impacts is the main way of increase in efficiency of radiation therapy of tumors.
Bibliography: Sincaline B. B. Radio biological bases of radiation therapy of malignant tumors, JI., 1979, bibliogr.; I r m about N e N to about S. P., etc. Biological bases of radiation therapy of tumors, M., 1976, bibliogr.