Objective to explore the effect of long-term low-dose X-ray on the blood system and genetic material in the health workers and to provide basis for protecting the radiological health workers.

目的探索长期接触低剂量X射线对医务人员血液系统及其遗传物质的影响，为当前放射医务人员的卫生防护工作提供依据。

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They found spots where radiation levels exceeded 100 microsieverts per hour, about the same dose as a chest X-ray.

他们发现辐射量已经超过了每小时100微西弗，这和做一次胸透所承受的辐射量相当。

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He calculated backward to figure out how big an X-ray dose would be needed to get the kind of images the machines produce.

于是他反向推算了一下扫描仪生成符合机场安检要求的图像所需的X射线剂量。

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The company says its Single Pose Secure scanner uses an extremely low-dose X-ray, equivalent to spending two minutes on an aircraft.

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The radiation dose from an individual dental X-ray, Dr Claus points out, has gone down by about half over the past 30 years or so.

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"To put that into context, 20mSv is the same dose you get from three computed tomography (X-ray) scans of your chest, roughly, " she told reporters.

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