title: [Studies on irradiation techniques of betatron electron beam].
mesh_terms: D004583:Electrons; D006801:Humans; D008441:Maxillary Neoplasms / Q000532:radiotherapy*; D008722:Methods; D011879:Radiotherapy Dosage; D011882:Radiotherapy, High-Energy / Q000295:instrumentation; D013679:Technology, Radiologic; D014062:Tongue Neoplasms / Q000532:radiotherapy*