title: Radiotherapy quality control--portal and verification films.
authors.affiliation: Cookridge Hospital, Leeds.
authors.forename: S
authors.initials: S
authors.lastname: Griffiths
mesh_terms: D006801:Humans; D011786:Quality Control; D011859:Radiography / Q000706:statistics & numerical data; D011878:Radiotherapy / Q000592:standards*