title: Radiation field edge detection in portal images.
authors.affiliation: Netherlands Cancer Institute (Antoni van Leeuwenhoek Huis), Radiotherapy Department, Amsterdam.
authors.forename: J
authors.initials: J
authors.lastname: Bijhold
authors.forename: K G
authors.initials: KG
authors.lastname: Gilhuijs
authors.forename: M
authors.initials: M
authors.lastname: van Herk
authors.forename: H
authors.initials: H
authors.lastname: Meertens
mesh_terms: D006801:Humans; D011882:Radiotherapy, High-Energy / Q000295:instrumentation / Q000379:methods*; D013679:Technology, Radiologic