在约克郡肺部查试验中对CT辐射剂量的评估
Gareth R Iball1,2, Charlotte E Beeching2, Rhian Gabe3
1Faculty of Health Studies, University of Bradford, Richmond Road, Bradford, BD7 1DP, United Kingdom.
The British journal of radiology
|February 2, 2024
概括
用于肺部查的低剂量CT扫描可达到约1mSv的有效辐射剂量. 这些剂量,终身癌症风险最小 (低于0.006%),证明了参与肺查试验的参与者的安全性.
科学领域:
- 放射学 放射学是一门学科.
- 医疗成像医学成像
- 公共卫生 公共卫生
背景情况:
- 肺癌查旨在通过使用低剂量计算机断层扫描 (CT) 早期检测来降低死亡率.
- 评估辐射剂量对于确保患者安全和优化查方案至关重要.
- 辐射右图像联盟 (RSNA QIBA) 提供了CT扫描中可接受图像质量的标准.
研究的目的:
- 评估和报告肺查试验的第一年进行的低剂量CT扫描中的辐射剂量.
- 为了将辐射剂量指标 (CTDIvol,DLP) 与参与者的特征如体重,性别和年龄相关联.
- 估计与这些查CT扫描相关的额外终身归因癌症风险.
主要方法:
- 追溯分析3521个低剂量CT扫描,符合RSNA QIBA图像质量标准.
- 记录的辐射剂量指标 (CTDIvol,DLP),参与者的身高,体重,性别和年龄.
- 评估剂量指标作为体重的函数,并计算有效剂量以确定癌症风险.
主要成果:
- 在所有扫描中,有效剂量的中位数为1.15 mSv (IQR:0.67 mSv).
- 对于体重为60-80公斤的参与者,有效剂量的中位数为0.97mSv (IQR:0.31mSv).
- 在男性和女性中,CTDIvol和体重之间发现了强烈的相关性;性别没有显著影响CTDIvol.
- 单次扫描的额外终身癌症风险在0.001%至0.006%之间.
结论:
- 低剂量CT肺部查方案可以为典型参与者达到约1mSv的有效辐射剂量.
- 这些辐射剂量被认为是类似的扫描仪和队列上的肺部查的典型.
- 实现的低辐射剂量确保了高图像质量,同时保持了最小的额外终身癌症风险.
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