Wurm J, Säbel M, Weishaar J
Rofo. 1982 Aug;137(2):201-11. doi: 10.1055/s-2008-1056186.
The ROC method is being used increasingly in radiology for the purpose of checking image quality. A phantom has been developed for use in mammography, which takes account of the tissues of the breast and of abnormal changes. In order to compare image quality, various films and film-screen systems were employed. The effect of slice-thickness, focal spot size and radiation scatter on image quality has been examined. The suitability of the method for quality control has been tested on a small sample. In addition, certain important parameters of the radiographic technique have been determined by physical measurements. Certain methodological difficulties must be considered, eg. the problem of statistical significance. It has been shown, however, that film-screen systems can approach the image quality of screenless films and require a lower dose of x-rays. For larger slice thickness, the use of a grid produces significantly better results than film without screens alone. The findings of the quality control show that it is important to check image quality by means of physical measurements. The ROC method has proved less valuable in this respect.
ROC方法在放射学中越来越多地用于检查图像质量。已经开发出一种用于乳腺摄影的模体，它考虑了乳腺组织和异常变化。为了比较图像质量，使用了各种胶片和增感屏系统。研究了切片厚度、焦点尺寸和辐射散射对图像质量的影响。该方法在质量控制方面的适用性已在小样本上进行了测试。此外，通过物理测量确定了放射技术的某些重要参数。必须考虑某些方法上的困难，例如统计显著性问题。然而，已经表明，增感屏系统可以接近无屏胶片的图像质量，并且需要较低剂量的x射线。对于较大的切片厚度，使用滤线栅比单独使用无屏胶片产生的效果明显更好。质量控制的结果表明，通过物理测量检查图像质量很重要。在这方面，ROC方法已被证明价值较小。
