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Eleventh Prefectural Oversight Committee Meeting: Thyroid Ultrasound Examination Results

The Proceedings of the 11th Prefectural Oversight Committee Meeting for Fukushima Health Management Survey was released on June 4, 2013.  Below is the translation of the thyroid ultrasound examination, preceded by a summary and a quick analysis of the results.

The original Japanese results for the thyroid ultrasound examination are found here.

The official English translation is found here.

Previous survey results can be found here.

PDF of this post is found here.


This report covers the thyroid ultrasound examination results for Fiscal Year Heisei 23 (FYH23 or H23 here) or FY2011 as well as Fiscal Year Heisei 24 (FYH24 or H24 here) or FY2012.  It offers more information than previous reports, as in breakdown by municipalities.  However, it fails to correlate findings with estimated individual exposure doses, a point repeatedly brought up at the post-committee meeting press conferences, especially in regards to the cancer cases.Previously, the Committee always insisted on privacy prote…

12 Thyroid Cancer Cases Confirmed in Fukushima Children: Preliminary Results of FY2011/FY2012 Fukushima Thyroid Examination

The Eleventh Planning Committee of the Prefecture Health Management Survey met on June 5, 2013.  The preliminary data for the thyroid ultrasound examination was released to the press at the meeting.

Overall, a higher percentage of Fukushima children, tested in the Fiscal Year Heisei 24 (FY2012), are showing thyroid ultrasound abnormalities than the Fiscal Year Heisei 23 (FY2011) in all assessment categories.  In addition, the average diameter of the tumor increased.

Higher percentages of children have nodules larger than 5.1 mm or cysts larger than 20.1 mm, which put them in the assessment B category, qualifying for the secondary examination consisting of thyroid blood tests, a more detailed thyroid ultrasound examination, and a fine-needle aspiration biopsy if warranted.

The press is reporting that there are 28 cases suspected of thyroid cancer out of 174,000 children tested and that 12 of the 28 have been confirmed to have papillary thyroid cancer.  This is a bit misleading, as not all…

Shunichi Yamashita's Graph Alteration

At the Annual Meeting of the National Council on Radiation Protection & Measurements (NCRP) held in Bethesda, Maryland, on March 11, 2013, Shunichi Yamashita, the Radiation Risk Management Advisor for Fukushima Prefecture and then vice president of Fukushima Medical University, gave a keynote address.

Yamashita's keynote address video
Yamashita's keynote address PowerPoint presentation PDF

His PowerPoint presentation included a version of a graph from the 2005 study by Cardis et al., Risk of Thyroid Cancer After Exposure to 131I in Childhood, linked here Yamashita was one of the co-authors of the study, and the graph he referred to is "Fig. 2 Comparison of odds ratios (ORs) predicted by the best-fitting risk models with categorical …

Radiological Analysis of Namie Street Dust

Jun Ohnishi from Ibaraki Prefecture sent a sample of highly radioactive street dust from Namie, Fukushima, to Marco Kaltofen for analysis.

From Jun Ohnishi:
The sample was collected at the coordinate 37.4752, 140.9461. The address is 102-1 Shimizu Onoda Namie-machi, Futaba-gun, Fukushima Prefecture.

Onoda district is designated as the "restricted zone," but anybody can enter without permission.  If you proceed westward about 50m past the collection point, you come to a barricade at the entrance to the "exclusion zone."
Here's the video showing the actual collection of the sample.  "2013.4.6 Namie street dust 86.09 μSv/h at 1 cm above ground"
Truth we must face
By Jun Ohnishi
Radiological analysis of Namie street dust
May 31, 2013
Marco Kaltofen, MS, PE Boston Chemical Data Corp. 2 Summer Street Suite 14 Natick, MA USA 01760
Department of Civil and Environmental Engine…