Comparison of the distribation of doses calculated with Monte Carlo N-particle transport code and those practically measured by 60Co therapy facility
10.3760/cma.j.issn.0254-5098.2011.02.032
- VernacularTitle:蒙特卡罗N粒子运输法计算与实际测量的60Co治疗机剂量分布比较
- Author:
Meilian LIU
;
Qiuqiu CHEN
;
Hui HUANG
;
Xue BAI
;
Wei JIANG
;
Zhuokai HE
- Publication Type:Journal Article
- Keywords:
60Co therapy facility;
Monte Carlo method;
N-particle transport code
- From:
Chinese Journal of Radiological Medicine and Protection
2011;31(2):236-238
- CountryChina
- Language:Chinese
-
Abstract:
Objective To discuss the feasibility of Monte Carlo N-particle transport code(MCNP)simulated calculation.Methods The calculation in water phantom was contrasted with the practical measurements and the reported values using the percent depth dose(PDD)curve and normal peak scatter factor.Results There Was no significant difference between calculated and measured results in the 10 cm×10 cm field(t＝-0.41,P>0.05),however,there were significant differences in the 5 cm×5 cm field(t=7.2,P<0.05)and in the 12 cm×12 cm field(t=-4.6,P<0.05).There was no significant difierence between the calculated results and the reported values(t=-1.91,P>0.05).In the same radiation field,the PDD decreased as the depth increased,but increased as the size of the radiation field increased at the same depth.PDD and normal peak scatter factor were both important parameters for calculation of prescribed dose.Conclusions It is possible to establish a set of accurate and comprehensive percent depth doses and normal peak scatter factor parameters so as to provide the basis of clinical use, quality assurance and quality control for radiotherapy.
