Abstract
Accounting for the effective dose (ED, mSv) and calculating the radiation risk during CT is necessary to predict the long-term consequences of radiation exposure on the population. We analyzed the results of 1003 CT examinations of the chest in patients with suspected COVID-19 in the city diagnostic center. The average ED and confidence intervals (p ≤ 0.05) for patients with a single CT scan were: children (12–14 years) 2.59 ± 0.19 mSv, adolescents (15–19 years) 3.23 ± 0.17 mSv, adults (20–64 years), 3.43 ± 0.08 mSv, older persons (65 years and older) 3.28 ± 0.19 mSv. The maximum radiation risk values were 31.2*10–5 in women children and 29.3*10–5 in women adolescents, which exceeds the risk values for men in these age groups by 2.3 and 1.9 times, respectively. For the group of adult patients the risk was 11.2*10–5 in men and 17.4*10–5 in women, which is 1.6 times higher than in men. All these risk values are in the range of 10*10–5–100*10–5, which corresponds to the level LOW. For the group of older age patients, the radiation risk was 2.6*10–5, which corresponds to the level of 1*10–5–10*10–5, VERY LOW. Our materials shows in detail the technique to evaluate effective radiation doses for chest CT and calculate the radiation risk of the carcinogenic effects of this exposure.
Highlights
In the coming years, due to the introduction of methods of medical diagnostics and treatment using ionizing radiation, the growth of medical exposure of the Russian population expected to continue, especially due to computed tomography (CT)
We analyzed the results of 1003 CT examinations of the chest performed in patients with suspected COVID-19 during one week in October 2020 in the city diagnostic center
The proportion of patients with CT signs of pneumonia and without pathological signs amounted to a total of 54,6% and 45,4%, respectively, for each of the four age groups
Summary
Due to the introduction of methods of medical diagnostics and treatment using ionizing radiation, the growth of medical exposure of the Russian population expected to continue, especially due to computed tomography (CT). It is important to evaluate radiation dose levels and population radiation risks in the form of a possible oncological pathology among the population in the long term after exposure [1–8]. Galle [9] concluded that, compared to 700,000 spontaneous cancers per year, when recalculated to the French population, 7,000 deadly cancers are caused by radiation causes. 3,000 are associated with high concentrations in radon homes, 1,000- with radiation medical procedures, 10 - with radiation from the work of the Computed Tomography Scan nuclear industry and 1 - from increased natural radiation background. From medical exposure, 14.3% of all radiation-related oncological pathologies arise
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