Thyroid Ultrasound Examination: Outline (1/3)

Even though radiation effects are unlikely to be detected, ascertaining the current thyroid status of the relevant group of people is very important in order to monitor and support health for the long term. Therefore, the Thyroid Ultrasound Examination was conducted for all children in Fukushima Prefecture after the accident at Tokyo Electric Power Company (TEPCO)'s Fukushima Daiichi NPS over a period of approximately two and a half years from October 2011 (Preliminary Baseline Survey).

Then, in FY2014, the coverage was expanded to include those born from April 2, 2011, to April 1, 2012, and the Full-scale Survey was conducted as the second-round survey.

From the third-round survey onward, the participants receive examinations once every two years until they become 20 years old and once every five years thereafter.

Due to the impact of the COVID-19 pandemic, the fifth-round survey was conducted during the period of three years from FY2020 to FY2022.

• Included in this reference material on March 31, 2013
• Updated on March 31, 2023