title: [Collimating mask for treatment with 200 kV X-rays].
mesh_terms: D005153:Facial Neoplasms / Q000532:radiotherapy*; D006801:Humans; D008397:Masks; D011835:Radiation Protection / Q000295:instrumentation; D011879:Radiotherapy Dosage; D011882:Radiotherapy, High-Energy / Q000295:instrumentation*
vernacular_title: Máscara colimadora para el tratamiento con "rayos X de 200 kV".