title: Monte Carlo Simulation of a 6 MV X-Ray Beam for Open and Wedge Radiation Fields, Using GATE Code.
abstract: The aim of this study is to provide a control software system, based on Monte Carlo simulation, and calculations of dosimetric parameters of standard and wedge radiation fields, using a Monte Carlo method. GATE version 6.1 (OpenGATE Collaboration), was used to simulate a compact 6 MV linear accelerator system. In order to accelerate the calculations, the phase-space technique and cluster computing (Condor version 7.2.4, Condor Team, University of Wisconsin-Madison) were used. Dosimetric parameters used in treatment planning systems for the standard and wedge radiation fields (10 cm × 10 cm to 30 cm × 30 cm and a 60° wedge), including the percentage depth dose and dose profiles, were measured by both computational and experimental methods. Gamma index was applied to compare calculated and measured results with 3%/3 mm criteria. Gamma index was applied to compare calculated and measured results. Almost all calculated data points have satisfied gamma index criteria of 3% to 3 mm. Based on the good agreement between calculated and measured results obtained for various radiation fields in this study, GATE may be used as a useful tool for quality control or pretreatment verification procedures in radiotherapy.
authors.affiliation: Department of Medical Physics, Faculty of Medicine, Medical Physics Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.
authors.forename: Mohammad-Taghi
authors.initials: MT
authors.lastname: Bahreyni-Toosi
authors.affiliation: Department of Medical Physics, Faculty of Medicine, Medical Physics Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.
authors.forename: Shahrokh
authors.initials: S
authors.lastname: Nasseri
authors.affiliation: Department of Medical Physics, Faculty of Medicine, Medical Physics Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.
authors.forename: Mahdi
authors.initials: M
authors.lastname: Momennezhad
authors.affiliation: Department of Medical Physics, Faculty of Medicine, Medical Physics Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.
authors.forename: Fatemeh
authors.initials: F
authors.lastname: Hasanabadi
authors.affiliation: Department of Medical Physics, Faculty of Medicine, Medical Physics Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.
authors.forename: Hamid
authors.initials: H
authors.lastname: Gholamhosseinian
keywords: Clustering; GEANT4 Application for Tomographic Emission; Monte Carlo simulation; phase-space technique; wedge radiation fields