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作者已往研究发现,1～1000伦/天剂量率不同时间间隔连续照射时,小鼠骨髓细胞形成结节的能力有所改变。剂量率小于50伦/天,成结节单位(CFU)数最初减低,约在照射30天后为一稳定状态所代替。对于稳定状态时,其 CFU 减低的水平取决于每天的照射剂量率。本文试图推论30天和100天连续照射之间 CFU 数稳定状态的建立及其水平,并用数学公式表达 CFU 数和每天照射剂量率之间的关系。
The authors’ previous studies have found that the ability of mice to form nodules in bone marrow cells changes when the dose rate of 1 to 1000 l/day is continuously irradiated at different time intervals. The dose rate was less than 50 ren/day, the number of nodule units (CFU) initially decreased and was replaced by a steady state approximately 30 days after irradiation. For steady state, the level of CFU reduction depends on the daily radiation dose rate. This article attempts to deduce the establishment and level of stable state of CFU number between 30 days and 100 days continuous irradiation, and use the mathematical formula to express the relationship between CFU number and daily irradiation dose rate.