Nuclear Techniques ›› 2018, Vol. 41 ›› Issue (6): 60201-060201.doi: 10.11889/j.0253-3219.2018.hjs.41.060201


Optimalizing electron beam parameters of linear accelerator based on Monte Carlo simulation

ZHANG Fan1,2, XIAO Ainong1, WU Haibiao1, AI Xiaohong1, QU Guopu2, LI Pian1, LI Wenjun1, CAI Manbo1   

  1. 1 Department of Radiation Oncology, First Affiliated Hospital of University of South China, Hengyang 421001, China;
    2 School of Nuclear Science and Technology, University of South China, Hengyang 421001, China
  • Received:2018-02-05 Revised:2018-03-13 Online:2018-06-10 Published:2018-06-06
  • Supported by:
    Supported by Key Research and Development Program of Hunan Province (No.2015SK2022), Hunan Natural Science Youth Foundation (No.2016JJ3108)

Abstract: [Background] With the development of radiation technology, it needs to improve the accuracy of dose simulation.[Purpose] Build up a simplified benchmarking procedure to determine the incident electron beam parameters independently using a Monte Carlo linear accelerator model.[Methods] A 10 cm×10 cm field is simulated to acquire the parameters influence on the dose distributions for Varian IX 6 MV megavoltage electron beams.[Results] The calculated depth doses had no significant changes when the electron mean energy and radial intensity varied in 5.5~6.4 MeV and 0.1~0.4 cm respectively. And the dose profile simulated with an electron radial intensity in 0~0.19 cm had a good agreement with the measured dose profile in the main field while obvious discrepancies in the penumbra region. The mean angular spread was found to be 0.3° to get good matching between calculations and measurements at all considered depths.[Conclusion] Accurate dose distributions are achieved by using the incident electron beam parameters benchmarked with the proposed procedure. As the percentage depth doses and dose profiles are insensitive to the electron energy and radial intensity correspondingly, they are feasible to benchmark individually.

Key words: Monte Carlo, Electron beam parameters, Percentage depth doses, Dose profiles

CLC Number: 

  • TL53