title: Monte Carlo simulation for Neptun 10 PC medical linear accelerator and calculations of output factor for electron beam.
abstract: OBJECTIVE
  Exact knowledge of dosimetric parameters is an essential pre-requisite of an effective treatment in radiotherapy. In order to fulfill this consideration, different techniques have been used, one of which is Monte Carlo simulation.
  
  
  METHODS
  This study used the MCNP-4C to simulate electron beams from Neptun 10 PC medical linear accelerator. Output factors for 6, 8 and 10 MeV electrons applied to eleven different conventional fields were both measured and calculated.
  
  
  RESULTS
  The measurements were carried out by a Wellhofler-Scanditronix dose scanning system. Our findings revealed that output factors acquired by MCNP-4C simulation and the corresponding values obtained by direct measurements are in a very good agreement.
  
  
  CONCLUSIONS
  In general, very good consistency of simulated and measured results is a good proof that the goal of this work has been accomplished.
authors.affiliation: Medical Physics Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.
authors.forename: Mohammad Taghi
authors.initials: MT
authors.lastname: Bahreyni Toossi
authors.affiliation: Nuclear Medicine Research Center, Imam Reza Hospital, Mashhad University of Medical Sciences, Mashhad, Iran.
authors.forename: Mehdi
authors.initials: M
authors.lastname: Momennezhad
authors.affiliation: Medical Physics Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.
authors.forename: Seyed Mohammad
authors.initials: SM
authors.lastname: Hashemi
keywords: Dosimetry; Linear accelerator; Monte Carlo; Simulation