一次全身CT扫描的辐射剂量是20 ~30毫希弗。
A full-body CT scan gives a radiation dose of 20-30 millisieverts.
但作为应急措施，周二国家卫生大臣将限制提高到250毫希弗。
But as an emergency measure, the ministry of health on Tuesday raised that to an accumulated 250 millisieverts.
中川解释说，正常情况下，日本核电站的工作人员积累的核辐射剂量限制在100毫希弗以内。
Nakagawa said that normally nuclear power plant workers in Japan are limited to accumulated radiation doses of 100 millisieverts.
持续在250毫希弗的暴露下会导致白细胞的减少，100毫希弗的暴露中则会增加0.5%的患癌几率。
Accumulated exposure of more than 250 millisieverts can cause the loss of white blood cells, and exposure of 100 millisieverts produces an increase in the risk of cancer of about 0.5%.
持续在250毫希弗的暴露下会导致白细胞的减少，100毫希弗的暴露中则会增加0.5%的患癌几率。
Accumulated exposure of more than 250 millisieverts can cause the loss of white blood cells, and exposure of 100 millisieverts produces an increase in the risk of cancer of about 0.5%.
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