title: Raystation Monte Carlo application: evaluation of electron calculations with entry obliquity.
abstract: To evaluate the accuracy of Raystation's implementation for Monte Carlo VMC ++ with electrons at varying angles of incidence for low and medium energy electron beams. Thirty-two profile and percentage depth dose scans were taken at 5° incident angle intervals for 6 and 12 MeV and compared to extracted fluences from Raystation calculations using gamma analysis with 2 %/2 mm criteria. Point dose measurements were compared to calculated doses to determine output accuracy. Electron profile and percentage depth dose curves for both energies show good agreement between 0° and 20° with 29/30 scans above 90 % pass rate. Average variation between calculated and measured point doses was -0.73 % with all measurements falling within ±2 % of calculated dose. Raystation's application of VMC ++ Monte Carlo algorithm provides clinically acceptable accuracy for low and medium energy electron dosimetry at incident angles up to 20° for Varian Clinac iX models.
authors.affiliation: Radiation Oncology Centre, Sydney, Australia. ben.archibald-heeren@roc.team.
authors.forename: Ben
authors.identifier: http://orcid.org/0000-0001-9013-6048
authors.initials: B
authors.lastname: Archibald-Heeren
authors.affiliation: Radiation Oncology Centre, Sydney, Australia.
authors.forename: Guilin
authors.initials: G
authors.lastname: Liu
mesh_terms: D004307:Dose-Response Relationship, Radiation; D004583:Electrons; D005720:Gamma Rays; D006801:Humans; D008962:Models, Theoretical; D009010:Monte Carlo Method; D019047:Phantoms, Imaging; D011874:Radiometry
keywords: Electrons obliquity; Monte Carlo; Raystation