A new study offers the most solid evidence to date that radiation from CT scans increases children's risk of developing leukemia and head and neck cancer.
一项新研究提供了迄今为止最确凿的证据,证明CT扫描产生的辐射将增加儿童罹患白血病和头颈部癌症的风险。
Children and adolescents who received two to three computed tomography scans of the head were three times as likely to develop brain cancer as those in the general population, according to the study of 176,587 children.
6月6日《柳叶刀》(Lancet)杂志网站发表了这项对176,587名儿童所进行研究的结果,研究显示,接受过二至三次CT扫描的儿童和青少年患脑癌的概率是普通人的三倍,接受过五至10次头部CT扫描的儿童患白血病的风险则是普通人的三倍。
The study, published online Wednesday in the journal Lancet, also said the risk of contracting leukemia was three times as great for children who received five to 10 CT scans of the head.
这项研究的作者强调,整体患癌概率仍然非常低,而且CT扫描的直接好处(例如检查头部损伤)仍然大于风险。
The study's authors emphasized that the overall likelihood of getting the cancers remained very small and that the immediate benefits of the scans, such as in detecting head injuries, still outweigh the risks.
这项研究发现,每接受一次CT扫描,患癌风险就随之升高,即使对于只接受过一次CT扫描(以前被称为CAT扫描)的人,风险也有升高。
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