Radiation doses of patients during computed tomography in 2020-2024 in comparison with the radiation doses of personnel working with ionizing radiation sources

«Radiation and Risk», 2026, vol. 35, No. 1, pp.127-137

DOI: 10.21870/0131-3878-2026-35-1-127-137

Authors

Matkevich Е.I. – Head of Dep., C. Sc., Med. Contacts: 23 Marshal Novikov str., Moscow, Russia, 123098. Tel.: 8(915) 094-75-80; e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it. .
Samoylov A.S. – Corr. Member of RAS, MD, Prof.
Sivenkov A.G. – Engineer; Bashkov A.N. – Head of Dep., C. Sc., Med. SRC – FMBC.
State Research Center − Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency, Moscow

Abstract

The aim is to summarize and analyze the radiation doses of personnel when working with ionizing radiation sources in industrial conditions and during computed tomography (CT) of the main anatomical zones at the SRC – FMBC in 2020-2024, to assess the additional risks of long-term consequences. A retrospective analysis of medical radiation doses was performed for 658 patients, per-sonnel working with man-made sources of ionizing radiation, during their 1151 CT scans, and radia-tion doses for 5728 patients in medical departments. Radiation doses for CT without contrast en-hancement (CT without CE) and with intravenous contrast enhancement (CT with CE) by anatomical regions were assessed according to Rosstat form No. 30, as well as professional radiation doses for personnel. Methodological recommendations MR 2.6.1.0215-20 were used to assess the risks of long-term consequences. The average annual radiation doses to personnel during CT were 3-15 times higher than the doses received in industrial conditions. The dose during CT without CE varied from 1.0 to 13.2 mSv, during CT with CE – from 2.8 to 29.4 mSv. The total radiation risk for personnel undergoing CT without CE was mainly at the “very low” and “low” levels, with the exception of women aged 20-24 – in combined areas it reached the “moderate” level. During CT with CE, the risk increased from “low” to “moderate” in women 20-24 and 45-49 years old and in men 20-24 years old. It has been established that personnel working with sources of ionizing radiation are exposed to significant additional radiation exposure when undergoing CT. As a result, the risks of long-term con-sequences increase, especially in young workers and women. It is advisable to introduce personal-ized algorithms for choosing diagnostic methods, using the justified appointment of standard CT methods, low-dose CT protocols, as well as alternative methods – magnetic resonance imaging and ultrasound studies.

Key words
ionizing radiation, computed tomography, personnel, patients, radiation diagnostics, radiation doses, risks of long-term consequences.

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