:: Volume 22, Issue 2 (4-2024) ::
Int J Radiat Res 2024, 22(2): 501-504 Back to browse issues page
Low cancer risk by implementing low-dose chest computed tomography protocol during Covid-19 outbreak
F. Rasoulinejad , M. Keshtkar
Medical Physics and Radiology Department, Faculty of Medicine, Infectious Diseases Research Center, Gonabad University of Medical Sciences, Gonabad, Iran , Keshtkar.dmohammad@yahoo.com
Abstract:   (2030 Views)
Background: The aim of this study was to evaluate the radiation dose effect of a low-dose chest computed tomography (CT) protocol implemented in our hospital during the outbreak of Coronavirus disease 2019 (COVID-19) by estimating lifetime attributable risk (LAR). Materials and Methods:  A total of 583 patients were randomly included in this study. The values of volumetric CT dose index (CTDIvol, mGy) and dose length product (DLP, mGy.cm) were extracted from CT console. CT-Expo is a CT dose software that was used to estimate effective dose (E) and organ doses. Lifetime attributed risk (LAR) of cancer incidence were calculated according to the Biological Effects of Ionizing Radiation (BEIR) VII report. Results: Of the 583 patients included in this study, 262 (44.9%) were men and 321 (55.1%) were women. The third quartile of CTDIvol and DLP were 2.5 mGy and 79.4 mGy.cm, respectively. The mean value of E was 1.1 ± 0.3 mSv, and it was statistically higher in females. Esophagus, lung and thymus received highest doses, and also in females breast received highest dose. The mean LAR of lung cancer was 5.3 per 100,000 patients, while the mean LAR of liver cancer was 0.1 per 100,000 patients. Conclusions: Despite the large number of chest CT scans during the Covid-19 era, the low-dose chest CT protocol implemented in our hospital caused low doses to organs and very low cancer risks.
Keywords: Tomography, X-Ray computed, Covid-19, lifetime risk, radiation exposure.
Full-Text [PDF 577 kb]   (721 Downloads)    
Type of Study: Short Report | Subject: Radiation Biology
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