患者剂量调查和确定常规计算机断层扫描检查的诊断参考水平在印度Uttarakhand,印度
Satish C Uniyal1, Mukesh Prasad1, Shailendra Raghuvanshi2
1Department of Medical Physics, Himalayan Institute of Medical Sciences, Swami Rama Himalayan University, Jolly Grant, Dehradun, 248 016, India.
这项研究确定了印度计算机断层扫描 (CT) 扫描的当地诊断参考水平 (DRL),发现大多数患者的辐射剂量与国际标准相比. 建议包括质量保证和参数优化,以尽量减少暴露.
科学领域:
- 医学物理 医学物理
- 放射学 放射学是一门学科.
- 公共卫生 公共卫生
背景情况:
- 计算机断层扫描 (CT) 的使用在全球范围内不断增加.
- 来自CT扫描的患者辐射暴露是一个重大问题.
- 建立区域诊断参考水平 (DRL) 对于剂量优化至关重要.
研究的目的:
- 为了估计患者的辐射剂量,用于例行头部,胸部和腹部CT检查在印度Uttarakhand.
- 为这些程序建立局部诊断参考水平 (DRL).
- 将印度DRL与国际数据进行比较.
主要方法:
- 对49台CT扫描仪进行了调查,并记录了每种检查类型的15名患者的剂量计和患者特异性参数.
- 使用幻影中的电离室测量体积CT剂量指数 (CTDIvol),与控制台值相关 (R=0.98头部,R=0.97身体).
- 使用转换系数计算的剂量长度产物 (DLP) 和导出的有效剂量 (ED).
主要成果:
- 拟议的DRL (CTDIvol/DLP) 是42mGy/532mGy cm (头部),10mGy/271mGy cm (胸部) 和10mGy/392mGy cm (腹部) 的.
- 平均有效剂量 (ED) 是0.82 mSv (头部),3.25 mSv (胸部) 和4.24 mSv (腹部).
- 大多数DRL和所有ED都与国际公布的数据保持一致.
结论:
- 已建立的DLR为印度CT检查中的辐射剂量评估提供了基准.
- 建议进行常规质量保证,优化扫描参数,并遵守DRLs.
- 尽量减少辐射暴露是可以实现的,而不会影响诊断图像质量.
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