![]() The US National Academy of Sciences defined low doses of radiation as those up to ~100 mSv ( 45). Low-dose CT scanning reduces the radiation dose compared with conventional CT scans. Thus, clinicians should carefully consider whether the use of CT is justified or whether other types of scans would suffice. The extensive use of CT scans, which has increased over time, is a medical concern. However, the importance of strict screening targets, appropriate screening intervals ( 34), and good radiation protection ( 35-43) in minimizing unnecessary CT scans and CT radiation dose must be emphasized ( 44). Moreover, the use of CT is expected to increase rapidly with the development of medical and economic CT.ĬT screening can detect early tumors, reducing the mortality associated with tumors for example, screening for early lung cancer can reduce the mortality associated with lung cancer ( 30-33). Therefore, it is evident that the use of CT is important. Nevertheless, one study reported that the frequency of CT scans in the Jiangsu province in China was 223 per 1,000 individuals according to estimations, 17, 897, 994 CT scans were performed in the Jiangsu province in 2016( 19). There are no accurate data on the number of individuals who undergo CT examinations in China in one year. ![]() In 2017, over 84 million CT scans, after accounting for multiple scans, were performed in the United States ( 29). Thus, the present study mainly reviews low-dose CT radiation characteristics and discusses how to interpret low-dose CT-related research conclusions and the hazards of low-dose CT to help reduce unnecessary CT radiation.ĬT is widely used worldwide ( 19-28). Unfortunately, there is no specialized or concise literature pertaining to this topic. However, not all physicians are aware of the nature and complexity of low-dose CT radiation hazards or prescribe a comprehensive and rational low-dose CT examination in line with the low-dose CT radiation research conclusions. Careful consideration of the research population, radiation characteristics, and other implementation conditions is necessary prior to the application of research conclusions about low-dose CT scans or other relevant radiation research to ensure that the treatment is scientifically sound and reasonable.Ĭonsidering the different academic viewpoints and characteristics of CT radiation, it is necessary to comprehensively and correctly understand the hazards associated with low-dose CT radiation. The academic viewpoints related to the characteristics of CT radiation and research design characteristics vary. Notably, an increasing number of studies have indicated that radiation below certain doses may benefit the body by stimulating the repair mechanisms to reverse existing damage, which can protect organisms from subsequent radiation exposure or other risk exposures that may induce cancer ( 1, 17, 18). In contrast, some authors have reported no association between repeated CT scans and an increased risk of cancer ( 15, 16). ![]() Studies have shown that even low doses of diagnostic CT radiation can induce cancer development ( 10, 14). The risk of CT radiation-induced cancer has been reported in several epidemiological studies ( 10-13). Computed tomography (CT) has received increasing attention in previous years. Humans are exposed to natural sources of radiation every day ( 1-9). ![]()
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