40 years of development in radiotherapy.
D001918:Brachytherapy; D004583:Electrons; D006801:Humans; D009369:Neoplasms / Q000532:radiotherapy*; D011868:Radioisotopes / Q000627:therapeutic use; D011878:Radiotherapy / Q000639:trends*; D011879:Radiotherapy Dosage; D011882:Radiotherapy, High-Energy; D014894:Weights and Measures
D011868:Radioisotopes