Age-based diagnostic reference levels and achievable doses for paediatric CT: a survey in Shanghai, China

IF 1.4 4区 环境科学与生态学 Q4 ENVIRONMENTAL SCIENCES
Fanqiaochu Yang and Linfeng Gao
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Abstract

Computed tomography (CT) is extensively utilised in medical diagnostics due to its notable radiographic superiority. However, the cancer risk associated with CT examinations, particularly in children, is of significant concern. The assessment of cancer risk relies on the radiation dose to examinees. Diagnostic reference levels (DRLs) and achievable doses (ADs) were used to assess the level of radiation dose in CT examinations widely. Although the national DRLs of paediatric CT have been explored in China, few local DRLs at the city level have been assessed. To set up the local DRLs and ADs of paediatric CT, we investigated the radiation dose level for paediatric CT in Shanghai. In this survey, a total of 3061 paediatric CT examinations underwent in Shanghai in 2022 were selected by stratified sampling, and the dose levels in terms of volume CT dose index (CTDIvol) and the dose-length product (DLP) were analysed by 4 age groups. The DRLs and ADs were set at the 75th and 50th percentile of the distribution and compared with the previous studies at home and abroad. The survey results revealed that, for head scan, the DRLs of CTDIvol were from 25 to 46 mGy, and the levels of DLP were from 340 to 663 mGy·cm. For chest, the DRLs of CTDIvol were from 2.2 to 8.3 mGy, and the levels of DLP were from 42 to 223 mGy·cm. For abdomen, the DRLs of CTDIvol were from 6.3 to 16 mGy, and the levels of DLP were from 181 to 557 mGy·cm. The ADs were about 60% lower than their corresponding DRLs. The levels of radiation doses in children-based hospitals were higher than those in other medical institutions (P < 0.001). In conclusion, there was still potential for reducing radiation dose of paediatric CT, emphasising the urgent need for optimising paediatric CT dose in Shanghai.
基于年龄的儿科 CT 诊断参考水平和可达到剂量:中国上海的一项调查
计算机断层扫描(CT)因其明显的放射优势而被广泛应用于医疗诊断。然而,与 CT 检查相关的癌症风险,尤其是对儿童的癌症风险,引起了人们的极大关注。癌症风险的评估取决于受检者的辐射剂量。诊断参考水平(DRLs)和可达到剂量(ADs)被广泛用于评估 CT 检查的辐射剂量水平。虽然中国已经探索了儿科 CT 的国家 DRLs,但很少对城市一级的地方 DRLs 进行评估。为了制定当地的儿童 CT 辐射剂量 可信限和 ADs,我们对上海儿童 CT 的辐射剂量水平进行了调查。本次调查采用分层抽样的方法,共抽取了2022年在上海接受CT检查的3061名儿童,并按4个年龄组分析了其容积CT剂量指数(CTDIvol)和剂量-长度乘积(DLP)的剂量水平。DRL和AD分别设定在分布的第75百分位和第50百分位,并与国内外以往的研究进行了比较。调查结果显示,头部扫描 CTDIvol 的 DRL 为 25 至 46 mGy,DLP 水平为 340 至 663 mGy-cm。胸部扫描的 CTDIvol DRL 为 2.2 至 8.3 mGy,DLP 为 42 至 223 mGy-cm。腹部 CTDIvol 的 DRL 为 6.3 至 16 mGy,DLP 为 181 至 557 mGy-cm。AD值比相应的DRL值低约60%。儿童医院的辐射剂量水平高于其他医疗机构(P < 0.001)。总之,儿科CT的辐射剂量仍有降低的空间,因此上海儿科CT剂量的优化迫在眉睫。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Journal of Radiological Protection
Journal of Radiological Protection 环境科学-公共卫生、环境卫生与职业卫生
CiteScore
2.60
自引率
26.70%
发文量
137
审稿时长
18-36 weeks
期刊介绍: Journal of Radiological Protection publishes articles on all aspects of radiological protection, including non-ionising as well as ionising radiations. Fields of interest range from research, development and theory to operational matters, education and training. The very wide spectrum of its topics includes: dosimetry, instrument development, specialized measuring techniques, epidemiology, biological effects (in vivo and in vitro) and risk and environmental impact assessments. The journal encourages publication of data and code as well as results.
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