After the survival cells were given second irradiation, both results of SCGE and micronucleus frequency showed that the second damage was correlated with the original irradiation doses.

• 存活细胞经二次照射后,SCGE结果和微核发生率结果表明,首次照射剂量与子代二次照射后的损伤程度存在剂量效应关系。