title: [The specification of parameters driven by measurement data in the construction of virtual sources in Monte Carlo simulation].
abstract: Dose calculation algorithms based on the Monte Carlo (MC) method are widely regarded as the most accurate tool available in radiotherapy. The MC simulation in radiotherapy has been split into two parts, the radiation source simulation and patient simulation. In this research, a virtual source for simulating the linear accelerator head was constructed with measurement-driven models. The dependence between the calculation accuracy and the specification of various parameters was studied by comparison between the measurement data and calculation results. It has been shown that the dose profile obtained by MC simulation can be consistent with measurement data, suggesting that the compound effect of primary photons and secondary photons are considered with appropriate parameter specification. The requirement of modeling for MC simulation can be met in clinical conditions.
authors.affiliation: Radiation Physics Center, West China Hospital, Sichuan University, Chengdu 610041, China.
authors.forename: Bin
authors.initials: B
authors.lastname: Tang
authors.forename: Chengjun
authors.initials: C
authors.lastname: Gou
authors.forename: Yuchuan
authors.initials: Y
authors.lastname: Fu
mesh_terms: D003198:Computer Simulation; D006801:Humans; D008954:Models, Biological; D009010:Monte Carlo Method; D019047:Phantoms, Imaging; D011879:Radiotherapy Dosage; D011880:Radiotherapy Planning, Computer-Assisted / Q000379:methods*; D020266:Radiotherapy, Conformal / Q000379:methods*