确定计算机断层扫描检查的局部诊断参考水平,使用特定大小的剂量估计
Faisal A Alrehily1, Khalid S Alqahtani1, Marwan H Aljohani1
1From the Department of Diagnostic Radiology Technology (Alrehily, Alqahtani, Aljohani, Alharbi, Abdulaal, Alshamrani, Alhazmi), College of Applied Medical Sciences, Taibah University; from the Department of Radiology (Alharbi), King Salman bin Abdulaziz Medical City; from the Department of Nuclear Medicine (Alsaedi), King Fahad General Hospital (Alsaedi), Al Madinah Al Munawwarah, Kingdom of Saudi Arabia; from the Department of Radiological Techniques (Al-Murshedi,), AL-Zahraa University for Women, College of Health and Medical Technology, Karbala; and from Physics Department (Al-Murshedi), College of Education for Pure Sciences, University of Babylon, Iraq.
本研究使用尺寸特定剂量估计 (SSDE) 确定CT扫描的局部诊断参考水平 (LDRL),通过考虑到患者尺寸来提高辐射安全. 新的LDRL与国际标准保持一致,并促进更准确的剂量监测.
科学领域:
- 放射学和医学成像学 医学成像学
- 辐射保护 辐射保护
- 医学物理 医学物理
背景情况:
- 诊断参考水平 (DRL) 对于在计算机断层扫描 (CT) 过程中限制患者的辐射暴露至关重要.
- 传统的DRL不考虑患者体型的变化,可能导致不准确的剂量评估.
- 尺寸特定剂量估计 (SSDE) 为辐射剂量评估提供了更个性化的方法.
研究的目的:
- 为沙特阿拉伯的常见CT检查建立当地DRL (LDRL).
- 评估SSDE在确定更准确和特定于患者大小的辐射剂量水平方面的实用性.
- 将已确定的LDRL与国际DRL进行比较,并评估SSDE和CTDIvol之间的相关性.
主要方法:
- 在2023年1月至3月期间,在麦地纳总医院收集了成年CT检查的数据.
- 针对每个患者的尺寸特定剂量估计 (SSDE) 使用有效直径 (Deff) 来计算.
- 对于大脑,椎,胸部,胸脊和KUB检查,确定了局部DRL.
主要成果:
- 对大脑,椎,胸部,胸脊和KUB的确定的LDRL分别为118mGy,12mGy,8mGy,17mGy和7mGy.
- 在大多数检查中 (p<0.05) 发现SSDE和CTDIvol之间存在很强的相关性.
- SSDEs高于CTDIvol,特别是在较小的患者中,突出显示了大小调整剂量测量的重要性.
结论:
- 确定的LDRL属于国际DRL范围,验证了该方法.
- SSDEs为CT的辐射安全实践提供了更准确和相关的数据.
- 建议在新的CT扫描仪中广泛采用SSDE,以确保辐射剂量管理的一致性和标准化.
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