title: 4, 6 and 8MV x-rays produced by linear electron accelerators.
mesh_terms: D000042:Absorption; D000497:Alloys; D000535:Aluminum; D004583:Electrons; D005374:Filtration; D006046:Gold; D006801:Humans; D010984:Platinum; D011879:Radiotherapy Dosage / Q000592:standards*; D011882:Radiotherapy, High-Energy / Q000592:standards*; D014867:Water
chemical_list: D000497:Alloys; D014867:Water; D010984:Platinum; D006046:Gold; D000535:Aluminum