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Abstract
Purpose: Mutual cooperation of biodosimetry laboratories is required for dose assessments of large numbers of people with potential radiation exposure, as in mass casualty accidents. We launched an intercomparison exercise to validate the performance of biodosimetry laboratories in South Korea.

Materials and methods: Participating laboratories shared metaphase images from dicentric chromosome assays (DCAs) and fluorescence in situ hybridization (FISH)-based translocation assays, which were evaluated based on their own scoring protocols.

Results: Overall, the coefficient of variation among three laboratories was less than 10% for counting scorable metaphases and chromosomal aberrations. However, there was variation in the interpretation of the International Atomic Energy Agency guidelines for selecting scorable metaphases and identifying chromosomal aberrations. In a technical workshop, scoring discrepancies were extensively discussed in order to harmonize biodosimetry protocols in Korea. In addition, metaphase images with agreement among all participating laboratories were compiled into an image databank, which can be used for education and training of scorers.

Conclusions: These findings and exercises may improve the accuracy of dose assessment, as well as increase the capacity for biodosimetry in South Korea.

Intercomparison exercise in Korea.jpg

국내 생물학적 선량평가 교차분석평가 및 이미지뱅크 구축 흐름도

Affiliations

Yang Hee Lee 1, Younghyun Lee 1, Hyo Jin Yoon 1, Su San Yang 1, Hae Mi Joo 2, Ji Young Kim 2, Seong-Jun Cho 2, Wol Soon Jo 3, Soo Kyung Jeong 3, Su Jung Oh 3, Yeong-Rok Kang 3, Ki Moon Seong 1
1Lab of Biological Dosimetry, National Radiation Emergency Medical Center (NREMC), Korea Institute of Radiological & Medical Sciences (KIRAMS), Seoul, Republic of Korea.
2Korea Hydro & Nuclear Power Co, Radiation Health Institute, Seoul, Republic of Korea.
3Department of Research Center, Dong Nam Institute of Radiological and Medical Sciences (DIRAMS), Busan, Republic of Korea.