title: X-rays: half-value thickness range 1.0-4.0 mm of Cu (200-400 kV). Closed-ended applicators.
mesh_terms: D000535:Aluminum; D003300:Copper; D005374:Filtration; D006801:Humans; D011879:Radiotherapy Dosage / Q000592:standards*; D012542:Scattering, Radiation; D014001:Tin; D014867:Water
chemical_list: D014867:Water; D014001:Tin; D003300:Copper; D000535:Aluminum