title: Short communication: portal imaging with film-cassette combinations: what film should we use?
abstract: A large number of commercially available X-ray films were obtained to assess their suitability for megavoltage radiotherapy portal imaging. The speed (represented by optimum film dose), gamma (gamma) and latitude of all these films were determined. Films with high gamma values are recommended for clinical use to maximize the low levels of radiation contrast produced by a megavoltage beam.
authors.affiliation: Department of Medical Physics, Oxford Radcliffe Hospital, UK.
authors.forename: R
authors.initials: R
authors.lastname: Roberts
mesh_terms: D006801:Humans; D019047:Phantoms, Imaging; D011882:Radiotherapy, High-Energy / Q000295:instrumentation*; D014962:X-Ray Film / Q000592:standards*