title: Absorbed dose comparison among commercial ionization chambers in polystyrene and acrylic phantoms.
abstract: Using the AAPM Task Group 21 protocol, photon and electron doses were compared in polystyrene and acrylic phantoms. The ionization chambers used were a Farmer graphite chamber, a PTW acrylic chamber, a homemade polystyrene chamber, and an Exradin air-equivalent chamber, all being of cylindrical type. A Memorial parallel-plate polystyrene chamber was also included. 60Co, 4-, 6-, and 18-MV x rays as well as 9- and 20-MeV electron beams were investigated.
authors.affiliation: Department of Radiation Oncology, Albany Medical College, New York.
authors.forename: H
authors.initials: H
authors.lastname: Kubo
authors.forename: P
authors.initials: P
authors.lastname: Cheng
mesh_terms: D000179:Acrylates; D003037:Cobalt Radioisotopes / Q000627:therapeutic use; D004583:Electrons; D004735:Energy Transfer; D006801:Humans; D008953:Models, Anatomic; D011137:Polystyrenes; D011874:Radiometry; D011878:Radiotherapy / Q000379:methods*; D011879:Radiotherapy Dosage; D014965:X-Rays
chemical_list: D000179:Acrylates; D003037:Cobalt Radioisotopes; D011137:Polystyrenes