Fig 1.
Areas to the south of the Fukushima Daiichi nuclear power plant.
WBC measurement was performed at the Jyoban Hospital in central Iwaki, which is located about 50 km south of the Fukushima Daiichi nuclear power plant. Study subjects were mainly hospital visitors from Iwaki and its suburbs.
Fig 2.
Monthly visitors and detected examinees.
Fig 3.
The proportion of doses attributed to internal Cs-137 radio-contamination in schoolchildren.
Two children among the 6,446 children examined showed Cs-137 contamination levels that were slightly over the detection limit, although their Cs-134 levels were below the detection limit.
Fig 4.
The proportion of doses attributed to internal Cs-137 radio-contamination in adults.
Among the 2,760 adults examined, 35 (1.26%) had very low levels of Cs-137 contamination. Meanwhile, their Cs-134 levels were below the detection limit.