由于放射性同位素具有发射无嗅无味不能被人们的感觉器官直接感知的辐射,辐射会通过能量在受照个体细胞中的沉积而发生生物效应:一类是随机性效应,即发生几率与剂量大小无关的效应,这种效应不存在剂量的阈值;另一类是非随机性效应,它是指严重程度随剂量的增加而加重的效应,它存在着剂量的阈值。因此,做好辐射防护是十分重要的。 Because radioisotopes emit radiation that is odorless and tasteless and can not be directly sensed by people’s sensory organs, radiation has a biological effect through the deposition of energy in the individual cells under test: one is the random effect, ie, the probability of occurrence is independent of the size of the dose The effect of this effect does not exist dose threshold; the other is a non-random effect, which refers to the severity of the increase with increasing dose effect, it exists the dose threshold. Therefore, good radiation protection is very important.