Comparative analysis of the assessment radiation risks of medical diagnostic exposure of patients based on the method of the International Commission on Radiological Protection and methodological recommendations of Rospotrebnadzor

This work is devoted to a comparative analysis of the assessment of radiation risks of medical diagnostic exposure of patients using a method based on the recommendations of the International Commission on Radiological Protection (ICRP) and the method presented in the methodological recommendations of Rospotrebnadzor (MR 2.6.1.0215-20). In the course of the study, the authors analyzed the results of calculations of the lifetime attributable risk of oncological mortality calculated by these methods. As an example, the procedure of a single passage of computed tomography of the chest organs without contrast was considered. In the first case, the risk value was calculated using the methodology of ICRP Publication 103 based on organ doses for the following ages of men and women: examination at 22, 27, 32, 37, 42, 47, 52, 57, 62, 67, 72, 77, 82 and at 87 years old. In the second case, the data given in the tables presented in the methodological recommendations were considered, but without considering hereditary effects. The analysis was carried out for two cases: when the difference between effective doses between computed tomography procedures did not exceed 30%, and when the difference was more than 30%. The authors of the work found that the difference in the risk assessment between the two methods exceeds 1.5 times for the age groups of 65 years and older, for men and women, if the effective doses are close. If the difference in dose between the two procedures was more than 30%, then a 1.5-fold difference in risks was observed in age groups 60 years and older. Risk assessment was performed with account of age and gender characteristics, as well as with the use of medical and demographic data of the Russian population.