放射事故外照射对人体剂量分布的研究

Dose distribution in human body in external irradiation accidents

目的研究各种放射照射条件下人体内剂量分布及剂量学参数的特点。方法考虑各种参数在计算中的影响后，用组织空气比方法计算得出人体内的剂量分布，进而计算出各剂量学参数，并利用组织等效仿真人体模型进行了实验验证。结果人体内剂量分布越均匀，干细胞剂量与平均剂量越接近；干细胞剂量可大于平均剂量；全身干细胞剂量计算值与实验值之差小于５％。结论所用计算方法与程序是可靠的。该计算程序已在实际事故处理中得到了应用。

Objective To study the dose distribution in human body and dose parameters under various exposure conditions Methods In consideration of various factors, we calculated the dose distributions in human body by tissueair ratio Then dosimetric parameters were obtained The calculation was verified by experiments using tissue equivalent anthropomophic phantom ResultsTBZThe more homogeneous the dose distribution was, the stem cell dose was closer to the average dose Stem cell dose could be larger than average dose The difference between stem cell dose calculated and that by experiments was less than 5% Conclusion The calculation method and the program were reliable The computer program has been applied in radiation accidents