通过自动化质量测量提高计算机断层扫描的安全性:放射科医生读者研究辐射剂量,图像噪音和图像质量
Rebecca Smith-Bindman1, Yifei Wang, Carly Stewart
1From the Department of Epidemiology and Biostatistics, University of California San Francisco, San Francisco, CA (R.S.-B., Y.W., C.S., J.L., P.W.C.); Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California, San Francisco, San Francisco, CA (R.S.-B.); Philip R Lee Institute for Health Policy Studies, University of California San Francisco, San Francisco, CA (R.S.-B.); Department of Radiology and Biomedical Imaging, University of California San Francisco, San Francisco, CA (M.K.); Department of Radiology, University of Washington, Seattle, WA (A.C.W.); Department of Radiology, University of Maryland Medical Center and Baltimore VA Medical Center, Baltimore, MD (E.S.); Department of Medicine and Pediatrics, University of California Davis Health, Sacramento, CA (M.R., P.S.R.); Department of Radiology, University of Wisconsin, Madison, WI (T.P.S.); and Kaiser Foundation Health Plan and Hospitals (A.B.B.).
辐射剂量和图像噪声与放射科医生对计算机断层扫描 (CT) 图像质量的评估相关. 这些因素可以用作自动化指标,以减少辐射暴露,而不会影响诊断准确度.
科学领域:
- 医学成像物理 医学成像物理
- 放射学质量保证 质量保证
- 医疗信息学 医疗信息学
背景情况:
- 按绩效付费的项目需要对计算机断层扫描 (CT) 进行质量测量.
- 现有的CT图像质量测量缺乏对放射科医生的评估进行验证.
- 需要自动化指标来平衡辐射剂量减少和诊断图像质量.
研究的目的:
- 开发一种自动化的CT图像质量测量仪.
- 测试放射科医生的主观图像质量评级与辐射剂量和图像噪声的客观测量之间的关系.
- 为了验证CT图像质量评估的定量方法.
主要方法:
- 经过董事会认证的放射科医生对14个类别的200次诊断CT检查的图像质量进行了评分.
- 放射科医生评价图像质量为优秀,充足,边缘可接受或差.
- 评级,辐射剂量 (几何SD) 和图像噪声 (SD) 之间的关系被量化.
主要成果:
- 在24,800个评级中,大多数 (89%) 是可以接受的.
- 在大多数CT类别中,增加的辐射剂量和图像噪声与图像质量评级有统计学意义的相关性.
- 对于常规的腹CT,更高的剂量增加了可接受的评级,而更高的噪音降低了它们.
结论:
- 辐射剂量和图像噪声与放射科医生对大多数CT类别的图像质量评估相关.
- 这些客观指标适用于自动化质量计划.
- 这种方法鼓励减少辐射剂量,同时保持诊断效用.
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