FUKUSHIMA Lives on the Line

264Table 2. Breakup Based on Region and Radiation Dose RateDistribution Based on the Radiation DoseCumulative radiation dose (mSv)All dataAexcluding those engaged in radiation-related activitiesBBreakup of the left columnRatio of B (%)Kawamata (Yamakiya)CNamieDIitateEFG0564514130.594.6- less than 16,0145,5911445,20724057.4- less than 22,2402,0812081,45841521.4- less than 38748251203453608.4- less than 440338745832594.0- less than 529829019302413.0- less than 621920314211682.14.7- less than 71351302161121.3- less than 86762014480.6- less than 9504607390.4- less than 10171602140.2- less than 11302609170.30.7- less than 1215140590.1- less than 131180080.1- less than 14960240.1- less than 15770340.1- more than 1523100730.0Total10,4689,7475537,2501,944100.0100.0(excluding those engaged in radiation-related activities)6,0004,00000~2~1~3~4~5~6~7~8~9~10~11~12~13~14~153,0005,0002,0001,000mSv15~people452,0815,5918253872902031306246162614867101. Purpose of the SurveyOn the basis of the radiation dose rate after the Fukushima Daiichi nuclear power plant accident, we assume minimal health hazards. However, there have been reports of pediatric thyroid cancer after the Chernobyl nuclear disaster due to internal radiation exposure to radioactive iodine. Therefore, to study the thyroid status of in children, monitor their long-term health, and appease the concerns of children and their guardians, we have been conducting the thyroid examination since October 2011.2. Implementation Schedule(1)Subjects: Approximately 360,000 residents aged 0–18 years as of March 11, 2011 (at the time of the earthquake). Specifically, the prefectural residents born between April 2, 1992 and April 1, 2011 (including evacuees in other prefectures).(2)Examination method: If the ultrasound examination of the thyroid showed nodular lesions, patients underwent a secondary examination (detailed ultrasound examination, blood and urine tests, and cytology examination at Fukushima Medical University Hospital and other facilities).(3)Implementation schedule: Residents have been going through the above examination from October 2011. This is expected to end in March 2014, after which time the examination will be conducted every two years up to the age of 20, and every five years thereafter to monitor their health. (4)Results (2011) and implementation schedule (2012): By the end of 2011, we had examined 38,114 subjects of government-designated evacuation zones in our hospital and other public facilities such as in Minamisoma. About 48,000 subjects (almost 80% of the population) participated. From 2012, we plan to conduct the examination for subjects living outside of these evacuation zones (approximate population of 160,000 subjects in 2012).Thyroid ExaminationFukushima Health Management Survey