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  • [Phys Med Biol.] CPU time optimization and precise adjustment of the Geant4 physics parameters for a VARIAN 2100 C/D gamma radiotherapy linear accelerator simulation using GAMOS.

    CIEMAT / Arce P*

  • 출처
    Phys Med Biol.
  • 등재일
    2018 Jan 25
  • 저널이슈번호
    63(3):035007. doi: 10.1088/1361-6560/aaa2b0.
  • 내용

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    Abstract
    We have verified the GAMOS/Geant4 simulation model of a 6 MV VARIAN Clinac 2100 C/D linear accelerator by the procedure of adjusting the initial beam parameters to fit the percentage depth dose and cross-profile dose experimental data at different depths in a water phantom. Thanks to the use of a wide range of field sizes, from 2  ×  2 cm2 to 40  ×  40 cm2, a small phantom voxel size and high statistics, fine precision in the determination of the beam parameters has been achieved. This precision has allowed us to make a thorough study of the different physics models and parameters that Geant4 offers. The three Geant4 electromagnetic physics sets of models, i.e. Standard, Livermore and Penelope, have been compared to the experiment, testing the four different models of angular bremsstrahlung distributions as well as the three available multiple-scattering models, and optimizing the most relevant Geant4 electromagnetic physics parameters. Before the fitting, a comprehensive CPU time optimization has been done, using several of the Geant4 efficiency improvement techniques plus a few more developed in GAMOS.

     

     

    Author information

    Arce P1, Lagares JI.
    1
    Technology Department, Scientific Instrumentation Division, Medical Applications Unit, Centro de Investigaciones Energéticas, MedioAmbientales y Tecnológicas (CIEMAT), Madrid, Spain.

  • 편집위원

    GEANT4기반 몬테칼로중에서 아직 가모스(GAMOS)에 대해서는 잘 몰랐는데 소개용으로 좋은 논문 같습니다.

    2018-03-15 15:52:39

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