X-ray radiation can dramatically increase cancer risk | x射线辐射可以显着增加癌症的风险

X-ray exposure increase risk of various cancers

Chinese researchers compared two groups of medical workers, one group (25,782) whose work had nothing to do with x-ray radiation and another group (27,011) who were exposed to x-ray due to their work, for their risk of various cancers. The data were collected between 1950 and 1995. They found that the x-ray exposed group had a 20% increased risk of cancer.

Specifically, they found the risk of leukemia, skin cancer, female breast cancer, lung cancer, liver cancer, bladder cancer, and esophageal cancer was increased by 120%, 310%, 10%, 30%, 20%, 20%, 80% and 170%, respectively.

Considering the patterns of exposure related to the starting date, age and others, the study found that the risk of skin cancer, female breast cancer, and possibly thyroid cancer in medical workers is associated with their over-exposure to x-ray in the workplace.

Those employed before 1970 were exposed to x-ray radiation in a cumulative dose of 551 mGy while those starting to work between 1970 and 1980 received 82 mGy of x-ray radiation. In the first group, the risk of leukemia and solid cancers was increased by 140% and 20%, respectively while the risk was not significantly increased, risk of leukemia increased 70% while risk for solid cancers elevated by 10%.

The study indicates that when the cumulative dose of x-ray radiation reached a certain level, the radiation could increase the risk of cancer, significantly. （刘大卫）

x射线辐射可以显着增加癌症的风险

中国研究人员比较了两组医疗工作者，一组（25,782人），他们的工作与x射线辐射无关，另一组（27,011人）由于工作而被暴露于x射线。 数据收集于1950年至1995年间。他们发现，暴露组的癌症风险增加了20％。

具体来说，他们发现白血病，皮肤癌，女性乳腺癌，肺癌，肝癌，膀胱癌和食管癌的风险分别提高了120％，310％，10％，30％，20％，20％，80 ％和170％。

考虑到与开始日期，年龄和其他相关的暴露模式，研究发现，皮肤癌，女性乳腺癌和可能的甲状腺癌与其工作场所过度接触x射线有关。

在1970年以前就业的人员估计暴露于551 mGy的累积剂量，而1970年至1980年间开始工作的人员收到82 mGy。 在第一组中，白血病和实体癌的风险分别增加了140％和20％，另一组患者的风险没有显着增加，白血病风险增加了70％，而固体癌的风险提高了10％。

研究表明，当x射线辐射的累积剂量达到一定水平时，辐射可以显着增加癌症的风险。（刘大卫）