据长崎原爆资料中心的资料表明,受1～49cGy照射的人群,其癌症死亡率较对照偏低;受50～99cGy照射的男性,其痛以外死亡率亦明显低于对照.死亡率与剂量为“U”形曲线关系.实验证明,小鼠受低剂量X线照射,2个月后给与7.75cGy照射,其30天存活率明显增加.还发现具有高度转移活性的癌细胞难以向预先接受小剂量照射的小鼠肺部转移. According to the information of the Nagasaki Ignition Center, the cancer mortality rate among people exposed to 1 to 49 cGy is lower than that of the control; the mortality rate for men exposed to 50 to 99 cGy is also significantly lower than that of controls. Mortality and Dose For the “U” shaped curve relationship, experiments have shown that mice are exposed to low-dose X-rays and given to 7.75cGy after 2 months. Their 30-day survival rate is significantly increased. It is also difficult to detect cancer cells with high metastatic activity. The lungs were transferred to mice that had previously received small doses of radiation.