title: Direct beam control in radiotherapy with high energy photons.
mesh_terms: D002277:Carcinoma / Q000532:radiotherapy; D002817:Chordoma / Q000532:radiotherapy; D003036:Cobalt Isotopes; D006689:Hodgkin Disease / Q000532:radiotherapy; D006801:Humans; D008175:Lung Neoplasms / Q000532:radiotherapy; D008722:Methods; D009303:Nasopharyngeal Neoplasms / Q000532:radiotherapy; D011882:Radiotherapy, High-Energy; D013125:Spinal Neoplasms / Q000532:radiotherapy; D001749:Urinary Bladder Neoplasms / Q000532:radiotherapy
chemical_list: D003036:Cobalt Isotopes