Space Medicine & Medical Engineering  2008;21(4):299-303

Estimates of Space Radiation Exposure to Astronauts Using Male Voxel Model Based on MRI

Xianghong JIA ; Feng XU ; Zengxin HUANG ; Duicai LV ; Zhi ZENG ; Junli LI

Keywords

human model; MRI; dose; proton; Monte Carlo particle transporting program; GEANT4

Country

China

Language

Chinese

Abstract

Objective To predict the astronaut organs radiation exposure and related health risks in the space radiation environment, the calculated method is studied. Methods A male voxel human model based on MRI and radiation data bank was build. The calculation was carried out with Monte Carlo particle transporting program GEANT4. Results The organ absorbed dose distribution and the effec-tive doses to the model in isotropic proton fields with energies ranges from 10 MeV to 500 MeV were obtained. Conclusion Based on the Chinese astronaut voxel model and the data set of proton spectrum measured in the space cabin, the cumulated dose in the model is gotten. The calculated skin dose is about 148.6 μGy/d, which is within in the range of 100 -300 μGy/d, published by USA and Russia.