孕妇CT患者的胎儿剂量:比较四个软件包
Joël Greffier1, Asma Arjoun2, Chris Serrand3
1IMAGINE UR UM 103, Montpellier University, Department of Medical Imaging, Nîmes University Hospital, Nîmes, France. joel.greffier@chu-nimes.fr.
European radiology
|April 25, 2025
概括
使用的软件在接受CT扫描的孕妇中显著影响胎儿剂量 (FD) 计算. 差异通常很小,除非进行多次检查,否则不太可能改变患者管理.
科学领域:
- 医学物理 医学物理
- 放射性剂量测量 放射性剂量测量 放射性剂量测量
- 医疗成像医学成像
背景情况:
- 计算机断层扫描 (CT) 对于诊断孕妇疾病至关重要.
- 准确的胎儿剂量 (FD) 估计对于辐射风险评估至关重要.
- 有各种软件包用于计算FD,但它们的比较性能尚未得到很好的确立.
研究的目的:
- 为了比较来自四个不同的软件包的胎儿剂量 (FD) 计算.
- 评估软件选择对接受CT的孕妇FD估计的影响.
- 评估FD值在不同计算方法中的一致性.
主要方法:
- 追溯分析51名接受了CT腹部-骨盆和/或胸部-腹部-骨盆扫描的孕妇.
- 使用虚拟剂量-CTTM (VDCT),杜克器官剂量 (DOD),fetaldose.org和Conceptus剂量估计 (CODE) 软件来计算FD.
- 使用了占怀孕阶段的幻影,并比较了计算的FD.
主要成果:
- 在大多数软件包之间观察到中位数FD的显著差异 (p < 0.01).
- 中位数的FD在6.3mGy (fetaldose.org) 到8.6mGy (VDCT) 之间.
- 在软件之间发现不良一致性 (ICC <0.50),除了VDCT/CODE和fetaldose.org/CODE.
结论:
- 软件的选择显著影响胎儿剂量计算.
- 观察到的差异不太可能改变临床管理,除了多次CT检查的情况下.
- 国际辐射保护委员会的100mGy的FD极限很少在单次CT检查中达到.
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