Müller R D, Voss M, Hirche H, Buddenbrock B, John V, Bosch E
Central Radiological Diagnostic Institute, University Hospital Essen, Germany.
Eur Radiol. 1996;6(4):526-31. doi: 10.1007/BF00182488.
The extent to which the diagnostic performance of low-dosed storage phosphors can be improved by suitable image postprocessing was investigated. Storage phosphor radiographs and conventional 200- and 400-speed screen-film combinations of an anthropomorphic chest phantom with simulated nodules and linear structures were compared. The detection of test bodies was determined in a ROC analysis based on 16200 individual observations. The two analog screen-film systems did not differ significantly. As far as the storage phosphor radiographs are concerned, a higher diagnostic performance was achieved with a large filter kernel (S 40) whereas small filter kernels and edge-enhanced imaging modes reduced the detection of detail. The image quality of low-dosed storage phosphors is thus similar to high-amplification screen-film combinations if large filter kernels are used in postprocessing of the image.
研究了通过合适的图像后处理可在多大程度上提高低剂量存储磷光体的诊断性能。比较了存储磷光体射线照片与具有模拟结节和线性结构的拟人化胸部体模的传统200速和400速增感屏-胶片组合。基于16200个单独观察结果，在ROC分析中确定了测试物体的检测情况。两种模拟增感屏-胶片系统没有显著差异。就存储磷光体射线照片而言，使用大滤波核（S 40）可实现更高的诊断性能，而小滤波核和边缘增强成像模式会降低细节检测。因此，如果在图像后处理中使用大滤波核，低剂量存储磷光体的图像质量类似于高放大倍率增感屏-胶片组合。
