【摘要】 采用人外周血淋巴细胞体外培养胞浆阻滞微核测试法，观察用３Ｈ－ＴｄＲβ线和６０Ｃｏγ线照射引起的剂量－效应关系，并计算了３Ｈ，ＴｄＲβ线的相对生物效应值。３Ｈ－ＴｄＲβ线内照射和６０ＣＯγ线外照射的剂量效应关系均符合Ｙ＝Ａ＋ＢＸ２＝ＣＸ２线性－平方数学模式，淋巴细胞微核频率随β线和γ线剂量的增加而增加。３Ｈ－ＴｄＲβ线的ＲＢＥ均值为１．１９，表明其β线产生的生物效应是γ线的１．１９倍。更多还原

【Abstract】 Cytokinesis block micronucleus method was applied to study the irradiation effects of β-rays fromincorporated 3H-TdR and 60Coγ-rays on human peripheral blood lymphocytes in vitro. The dose-res-ponse reiationships were fitted satisfactorily to the linear-quadratic model: Y=A+BX+CX2. The fre-quency of microuclei increased with increased doses of internAl β-irradiation and external γ-irradia-tion. The average RBE of 3H一thymidine estimated by comparing the two equations was 1. 19.更多还原