title: Machine specific equivalent squares for two commonly employed blocked treatment fields.
abstract: In an attempt to find the most suitable method for determining the equivalent square for two commonly employed blocked field arrangements, a comparison of measured outputs was made for four different treatment machines. The machines varied by manufacturer, design, and energy. The fields in question were a midline-blocked field and a half-blocked field. The data obtained was used to streamline calculations made by technologists for the original treatment setting. It was further used to enhance the accuracy of computer-generated verification of the original setting. The authors recommend that each institution employing such fields consider obtaining similar data for their own treatment machines.
authors.affiliation: Elliot Hospital, Manchester, NH 03103.
authors.forename: F A
authors.initials: FA
authors.lastname: Bombardiere
authors.forename: R
authors.initials: R
authors.lastname: Ouellette
mesh_terms: D006801:Humans; D011867:Radioisotope Teletherapy / Q000295:instrumentation*; D011874:Radiometry / Q000379:methods*; D011879:Radiotherapy Dosage; D011882:Radiotherapy, High-Energy / Q000295:instrumentation*; D013679:Technology, Radiologic