title: Orthovoltage X-ray beams (0.5 mm-4.0 mm Cu HVL).
authors.affiliation: Medical Physics Department, Velindre NHS Trust, Whitchurch, Cardiff.
authors.forename: C W
authors.initials: CW
authors.lastname: Smith
mesh_terms: D003300:Copper; D006801:Humans; D011874:Radiometry / Q000592:standards; D011879:Radiotherapy Dosage / Q000592:standards*; D012015:Reference Standards; D012542:Scattering, Radiation; D014964:X-Ray Therapy / Q000592:standards*
chemical_list: D003300:Copper