Electron beams.
D000535:Aluminum; D004583:Electrons / Q000627:therapeutic use*; D006046:Gold; D006801:Humans; D007854:Lead; D008954:Models, Biological; D011137:Polystyrenes; D011879:Radiotherapy Dosage / Q000592:standards*; D011882:Radiotherapy, High-Energy / Q000592:standards*; D012542:Scattering, Radiation; D014867:Water
D011137:Polystyrenes; D014867:Water; D007854:Lead; D006046:Gold; D000535:Aluminum