title: The use of digitized port films in assessing new treatment modalities.
abstract: An inexpensive computer-based imaging system has been used to compare simulator and portal radiographs. The films were digitized, normalized, and then overlaid for measurement. In a test group of patients, a new treatment protocol for pelvis irradiation was evaluated using this technique. For 90% of the patients, the average error was found to be smaller than 5 mm, and there were no field placement errors greater than 1 cm.
authors.affiliation: Cancer Treatment and Research Foundation of Nova Scotia, Halifax, Canada.
authors.forename: J E
authors.initials: JE
authors.lastname: Aldrich
authors.forename: J A
authors.initials: JA
authors.lastname: Berry
authors.forename: J W
authors.initials: JW
authors.lastname: Andrew
mesh_terms: D005260:Female; D005833:Genital Neoplasms, Female / Q000532:radiotherapy*; D006801:Humans; D007091:Image Processing, Computer-Assisted; D011880:Radiotherapy Planning, Computer-Assisted / Q000379:methods*