title: [Monte Carlo simulation and validation of the multi-leaf collimator of Varian 23EX accelerator].
abstract: OBJECTIVE
  To simulate the multi-leaf collimator of Varian linear accelerator using Monte Carlo method.
  
  
  METHODS
  The multi-leaf collimator model was established using the DYNVMLC module of BEAMnrc and validated by comparison of Monte Carlo simulation and actual measurement results.
  
  
  RESULTS
  The simulation results were well consistent with the actual measurement results with a bias of less than 3%.
  
  
  CONCLUSIONS
  The multi-leaf collimator of Varian linear accelerator can be successfully modeled using Monte Carlo method for analysis of the impact of the geometric properties of the multi-leaf collimator on the dose distribution.
authors.affiliation: Department of Radiation Therapy, Guangdong Provincial Hospital of Chinese Medicine, Guangzhou 510006, China. E-mail: dzh_dzh@126.com.
authors.forename: Zhenhui
authors.initials: Z
authors.lastname: Dai
authors.forename: Xuetao
authors.initials: X
authors.lastname: Wang
authors.forename: Lin
authors.initials: L
authors.lastname: Zhu
authors.forename: Yu
authors.initials: Y
authors.lastname: Zhang
authors.forename: Zhexing
authors.initials: Z
authors.lastname: Liu
mesh_terms: D006801:Humans; D008962:Models, Theoretical; D009010:Monte Carlo Method; D010315:Particle Accelerators; D011879:Radiotherapy Dosage; D011880:Radiotherapy Planning, Computer-Assisted