title: An analytical expression for electron beam central axis depth doses.
abstract: An analytical expression based on four fitting parameters is proposed for a mathematical description of electron beam central axis depth dose distributions. The expression approximates well the measured electron beam data in the field size range from 4 x 4 cm2 to 25 x 25 cm2 and in the energy range from 6 to 20 MeV in all four regions of the electron depth dose curve: build-up, dose maximum, dose fall-off, and bremsstrahlung contamination.
authors.affiliation: Department of Medical Physics, Montreal General Hospital, McGill University, Montréal, Québec, Canada.
authors.forename: W
authors.initials: W
authors.lastname: Wierzbicki
authors.forename: E B
authors.initials: EB
authors.lastname: Podgorsak
mesh_terms: D006801:Humans; D008962:Models, Theoretical; D010315:Particle Accelerators; D011878:Radiotherapy / Q000295:instrumentation*; D011879:Radiotherapy Dosage / Q000592:standards; D012542:Scattering, Radiation