title: Evaluation of several film/screen combinations for megavoltage radiation therapy treatment field verification.
abstract: The introduction of a lower cost alternative to a film commonly used for megavoltage radiation therapy port films led to a comparison of two films (Kodak X-TL and X-OMAT G) in four metal screen cassette configurations. In addition to determination of H-D curves and point spread functions, images of humanoid phantom sections were obtained and evaluated for clinical "usefulness." The X-OMAT G film-screen combinations compared favorably with the X-TL film combinations with respect to the H-D Curves and point spread functions but there was a slight preference for X-TL film. There were no differences noted whether the film was used in the standard "ready pack" or naked in the cassettes.
authors.affiliation: Division of Radiation Oncology, Mayo Clinic/Foundation, Rochester, MN 55905.
authors.forename: I J
authors.initials: IJ
authors.lastname: Das
authors.forename: E C
authors.initials: EC
authors.lastname: McCullough
authors.forename: F
authors.initials: F
authors.lastname: Weber
mesh_terms: D005069:Evaluation Studies as Topic; D006801:Humans; D011882:Radiotherapy, High-Energy / Q000379:methods* / Q000592:standards; D014963:X-Ray Intensifying Screens