title: [Aluminum, steel and tungsten portal film cassettes for the imaging verification of 60Co photon irradiation up to 42 MV in a clinical trial].
abstract: The movement of the patient lowers the contrast of the portals, because the exposition time is long and identical with the treatment time. To enhance the contrast in the portals, the first models of the cassettes were modified under the clinical tests by a rear sheet nearly free from backscattering. With the modified cassettes iodine contrast media are weakly seen on the portals in the laboratory tests, but not in the clinical routine.
authors.affiliation: Klinik und Poliklinik für Strahlentherapie, Universität Göttingen.
authors.forename: H
authors.initials: H
authors.lastname: Kirschner
authors.forename: M
authors.initials: M
authors.lastname: Busch
authors.forename: C
authors.initials: C
authors.lastname: Bornkessel
authors.forename: K
authors.initials: K
authors.lastname: Dieckmann
authors.forename: E
authors.initials: E
authors.lastname: Dühmke
mesh_terms: D000535:Aluminum; D003037:Cobalt Radioisotopes / Q000627:therapeutic use*; D003287:Contrast Media; D004867:Equipment Design; D006801:Humans; D011786:Quality Control; D011827:Radiation; D011878:Radiotherapy / Q000295:instrumentation; D013232:Steel; D014414:Tungsten; D014963:X-Ray Intensifying Screens / Q000592:standards
chemical_list: D003037:Cobalt Radioisotopes; D003287:Contrast Media; D013232:Steel; D000535:Aluminum; D014414:Tungsten
vernacular_title: Die Aluminium-, Stahl- und Wolfram-Portfilmkassetten für die bildgebende Verifikation von Photonenbestrahlungen 60Co bis 42 MV in der klinischen Erprobung.