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应用四川大学计算机科学研制的MIAS-300图像分析仪,对大鼠吸入氧化钚气溶胶(肺初始沉积量为3.4±0.4kBq)后0.5～90d不同时间,肺沉积钚α粒子放射性自显影径迹集落的形态进行了定量分析。分析的参数主要有:径迹集落的面积、周长、等效直径、数密度、体积密度和形状因子等。结果说明,上述参数除形状因子外,均随着吸入后时间的增加而降低;用指数或幂函数模型进行曲线拟合,具有较好的函数依赖关系;对体积密度与吸入后0～90d时间作定积分计算,结果表明,在上述时间范围内,每天平均有1.54±0.06%的肺组织受到钚α射线的直接照射。
Applying the MIAS-300 image analyzer developed by computer science department of Sichuan University, the radioactive autoradiographic trace of plutonium-α particles in lung sediments was observed at different times of 0.5 ~ 90 days after inhalation of plutonium oxide aerosol (3.4 ± 0.4kBq initial lung deposition) The morphology of colonies was quantitatively analyzed. The main parameters of the analysis are: track colony area, perimeter, equivalent diameter, number density, bulk density and shape factor. The results showed that all the above parameters decreased with the increase of time after inhalation, except for the shape factor. Curve fitting with exponential or power function model had good function dependence. For the definite integral calculation, the results showed that on average, 1.54 ± 0.06% of the lung tissues were directly irradiated with the plutonium α ray within the above time range.