Evaluation of the assessment results of biological dose estimation capabilities by ISO 13528 robust analysis

Objective: To analyze the assessment results of biological dose estimation capabilities of 43 radiological health technology institutes nationwide with the use of ISO 13528 robust statistical method, and to evaluate and judge the biological dose estimation capabilities as well as levels of radiological health technology institutes. Method: Divided them into 4 different irradiation dose groups, each participating institution was randomly selected 2 blind samples to perform independent preparation, analysis, estimation of the irradiation dose, and returned the results within the prescribed time. According to the formula of z-score, the biological dose estimation results of 43 institutions were analyzed, and |z| ≤ 2 was qualified. Results: The proportion of |z| ≤ 2 in the 4 dose groups were 95.7% (1.7 Gy), 91.3% (2.1 Gy), 81.8% (2.8 Gy) and 90% (3.7 Gy), respectively. In the 44 institutions, 36 (83.7%) have two samples with |z| ≤ 2. Conclusion: ISO 13528 robust analysis can be used to evaluate the results of biological dose estimation capabilities. The biological dose estimation capabilities of most institutions are qualified, indicating that the overall levels of national biological dose estimation capabilities are qualified, only the capabilities of a few institutions need to be improved. (authors)