title: On the calculation of mean restricted collision stopping powers.
abstract: An analytical method for the calculation of ratios of mean restricted collision stopping powers (L/rho)(g)m averaged over the charged particle spectra and the photon spectrum that is accurate to first order has been developed, and it has been explored whether a moderate change in the photon fluence spectrum with field size has an effect on the mean restricted collision stopping power ratio in high-Z materials. The results of this study indicate that for the case of a miniphantom, moderate changes in the photon fluence spectrum have only a weak effect on the ratios of mean restricted collision stopping powers.
authors.affiliation: Department of Radiation Oncology, University of Florida, College of Medicine, Gainesville 32610-0385, USA. tomewa@bolus.health.ufl.edu
authors.forename: W A
authors.initials: WA
authors.lastname: Tomé
authors.forename: J R
authors.initials: JR
authors.lastname: Palta
mesh_terms: D002138:Calibration; D004583:Electrons; D007700:Kinetics; D008962:Models, Theoretical; D019047:Phantoms, Imaging; D017785:Photons / Q000627:therapeutic use*; D011829:Radiation Dosage; D012542:Scattering, Radiation