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目前普遍认为,人体体细胞在电离辐射下可发生突变,继而诱发肿瘤、白血病。国际辐射防护委员会在确定电离辐射最大容许量标准时,假定电离辐射所诱发白血病是不存在“阈值”,但实际电离辐射时与肿瘤、白血病发生的关系中是否存在“阈值”,至今尚无确实证据。从中山县肿瘤防治研究队一九七二年对该县的普查资料得知,我省中山县是肿瘤尤其是鼻咽癌的高发地区,同时县内不同地区的肿瘤发病率也不尽相同。为了解长期放射性本底辐
It is generally accepted that human somatic cells can mutate under ionizing radiation and then induce tumors and leukemias. The International Commission on Radiological Protection assumes no “threshold” for ionizing radiation-induced leukemia when determining the maximum allowable ionizing radiation exposure, but there is no definitive evidence of the existence of a “threshold” in the relationship between actual ionizing radiation and the development of tumors and leukemias . Zhongshan Cancer Prevention and Control Team in 1972 on the census of the county learned that Zhongshan County in our province is a high incidence of cancer, especially nasopharyngeal cancer, while the incidence of cancer in different regions of the county are not the same. To understand long-term radiological background radiation