Monte Carlo simulation methods of determining red bone marrow dose from external radiation
10.3760/cma.j.issn.0254-5098.2011.02.029
- VernacularTitle:蒙特卡罗方法计算外照射所致红骨髓剂量方法的研究
- Author:
Yiming GAO
;
Haikuan LIU
;
Naigu GU
;
Jinhai WU
;
Weiqin HUANG
;
Fengxian WANG
;
Li WANG
;
Xu SU
- Publication Type:Journal Article
- Keywords:
Monte Carlo method;
Red bone marrow;
Dose;
Human phantom simulation
- From:
Chinese Journal of Radiological Medicine and Protection
2011;31(2):225-228,235
- CountryChina
- Language:Chinese
-
Abstract:
Objective To provide evidence for a more reasonable method of determining red bone marrow dose by analyzing and comparing existing simulation methods.Methods By utilizing Monte Carlo simulation software MCNPX,the absorbed doses of red hone marrow of Rensselaer Polytechnic Institute (RPI)adult female voxel phantom were calculated throush 4 different methods:direct energy deposition.dose response function(DRF),King-Spiers factor method and mass-energy absorption coefficient (MEAC).The radiation sources were defined as infinite plate.sources with the energy ranging from 20 keV to 10 MeV.and 23 sources with different energies were simulated in total.The source was placed right next to the front of the RPI model to achieve a homogeneous anteroposterior radiation scenario.The results of different simulated photon energy sources through different methods were compared.Results When the photon energy was lower than 100 key,the direct energy deposition method gave the highest result while the MEAC and King-Spiers factor methods showed more reasonable results.When the photon energy was higher than 150 keV taking into account of the higher absorption ability of red bone marrow at highcr photon energy,the result of the King-Spiers factor method was larger than those of other methods.Conclusions The King-Spiers factor method might be the most reasonable method to estimate the red bone marrow dose from external radiation.
