航天医学与医学工程
航天醫學與醫學工程
항천의학여의학공정
SPACE MEDICINE & MEDICAL ENGINEERING
2008年
4期
299-303
,共5页
贾向红%许峰%黄增信%吕兑财%曾志%李君利
賈嚮紅%許峰%黃增信%呂兌財%曾誌%李君利
가향홍%허봉%황증신%려태재%증지%리군리
人体模型%磁共振成像%剂量%质子%蒙特卡罗粒子运输程序%GEANT4
人體模型%磁共振成像%劑量%質子%矇特卡囉粒子運輸程序%GEANT4
인체모형%자공진성상%제량%질자%몽특잡라입자운수정서%GEANT4
human model%MRI%dose%proton%Monte Carlo particle transporting program%GEANT4
目的 建立空间辐射环境下,航天员器官所受辐射剂量及对其健康危险的计算方法.方法 利用符合航天员体征的人体MRI图像,建立三维男性人体模型及辐射数据库,并结合蒙特卡罗粒子输运程序GEANT4用于剂量计算.结果 我们得到了模拟各向同性抽样情况下,10 MeV到500 MeV单个质子对人体辐射敏感器官的吸收剂量及有效剂量.结论 在航天员体征三维人体模型及辐射数据库的基础上.利用空间舱内测量质子谱,得到了舱内累计剂量.计算的皮肤剂量为148.6 μGy/d.该值与美国和俄罗斯发表的数据100-300μGy/d比较接近.
目的 建立空間輻射環境下,航天員器官所受輻射劑量及對其健康危險的計算方法.方法 利用符閤航天員體徵的人體MRI圖像,建立三維男性人體模型及輻射數據庫,併結閤矇特卡囉粒子輸運程序GEANT4用于劑量計算.結果 我們得到瞭模擬各嚮同性抽樣情況下,10 MeV到500 MeV單箇質子對人體輻射敏感器官的吸收劑量及有效劑量.結論 在航天員體徵三維人體模型及輻射數據庫的基礎上.利用空間艙內測量質子譜,得到瞭艙內纍計劑量.計算的皮膚劑量為148.6 μGy/d.該值與美國和俄囉斯髮錶的數據100-300μGy/d比較接近.
목적 건립공간복사배경하,항천원기관소수복사제량급대기건강위험적계산방법.방법 이용부합항천원체정적인체MRI도상,건립삼유남성인체모형급복사수거고,병결합몽특잡라입자수운정서GEANT4용우제량계산.결과 아문득도료모의각향동성추양정황하,10 MeV도500 MeV단개질자대인체복사민감기관적흡수제량급유효제량.결론 재항천원체정삼유인체모형급복사수거고적기출상.이용공간창내측량질자보,득도료창내루계제량.계산적피부제량위148.6 μGy/d.해치여미국화아라사발표적수거100-300μGy/d비교접근.
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.
