title: Low-megavoltage electron-beam therapy of head and facial skin cancer using a versatile polystyrene collimator system.
abstract: Twenty patients with multiple or recurrent superficial head and facial cancer were treated with low-megavoltage electron-beam therapy, using a readily adaptable polystyrene shield assembly with interchangeable collimators. Patient set-up times were reduced, treatment was simplified, and flexibility of therapy was achieved. Therapeutic response was excellent even in patients with extensive primary or recurrent skin cancer requiring large-field irradiation.
mesh_terms: D000368:Aged; D002280:Basal Cell Carcinoma / Q000532:radiotherapy*; D002294:Carcinoma, Squamous Cell / Q000532:radiotherapy*; D004583:Electrons; D005153:Facial Neoplasms / Q000532:radiotherapy*; D006257:Head; D006801:Humans; D008297:Male; D008875:Middle Aged; D009364:Neoplasm Recurrence, Local / Q000532:radiotherapy; D011879:Radiotherapy Dosage; D011882:Radiotherapy, High-Energy / Q000295:instrumentation* / Q000379:methods; D012878:Skin Neoplasms / Q000532:radiotherapy*