评估经常性CT检查和累积剂量患者的趋势
Andrew E Ferretti1, Nathaniel D Mercaldo1, Xinhua Li1
1Massachusetts General Hospital, Boston, MA, USA.
European journal of radiology
|April 11, 2025
概括
时间趋势显示,自2020年以来,计算机断层扫描 (CT) 成像实践发生了转变. 虽然经常性CT检查减少了,但累计有效剂量 (CED) 的中位数增加了,更少的患者接受高年辐射剂量 (≥100mSv).
科学领域:
- 放射学 放射学是一门学科.
- 医疗成像医学成像
- 辐射剂量计 辐射剂量计
背景情况:
- 了解经常性CT扫描中患者辐射暴露的时间趋势至关重要.
- 多次CT检查的高累积有效剂量 (CED) 引发了担忧.
- 以前的研究强调了接受高剂量 (≥100 mSv) 的患者数量,但缺乏时间分析.
研究的目的:
- 为了阐明接受高辐射剂量 (≥100 mSv) 的患者在11年内经常性CT检查时的时间趋势.
- 分析影响辐射暴露的成像实践和患者人口统计学的变化.
- 提供数据,为辐射安全政策提供信息.
主要方法:
- 从医院剂量管理系统中获取了2013-2023年的CT检查数据.
- 分析了接受复发CT的患者数量,中位数CED,以及剂量≥50mSv和≥100mSv的频率.
- 采用了与Newey-West协差估计的通用线性模型来量化时间趋势,并考虑了COVID-19大流行影响.
主要成果:
- 在11年内,403,997名患者中有53.7%接受了≥2次CT检查;6.6%的CED≥100mSv.
- 在2020年之后,复发性CT检查的比例下降了 (IRR: 1.029).
- 2020年后,中位数CED增加,而新年剂量≥100mSv的患者下降 (IRR:0.976).
结论:
- 2020年后,患者CT检查模式发生了转变,每年高累积剂量 (≥100 mSv) 的下降趋势.
- 观察到的变化表明,自2020年以来,成像实践或患者人口统计数据发生了变化.
- 研究结果为制定有关医学成像中的辐射安全政策提供了宝贵的见解.
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