title: Measurement of replacement factors for a parallel-plate chamber.
abstract: We have measured the replacement correction factors (Prepl) for a PTW/Markus parallel plate chamber at mean incident electron energies of 3.1, 4.4, 8.9, 13.0, 16.3, and 18.8 MeV. The factors are significantly different from unity at low energies.
authors.affiliation: University of Massachusetts Medical Center, Department of Radiation Oncology, Worcester 01655.
authors.forename: G C
authors.initials: GC
authors.lastname: Goswami
authors.forename: K R
authors.initials: KR
authors.lastname: Kase
mesh_terms: D004583:Electrons; D006283:Health Physics; D006801:Humans; D008961:Models, Structural; D011874:Radiometry / Q000295:instrumentation*; D011879:Radiotherapy Dosage; D011882:Radiotherapy, High-Energy