Müller R D, Herting D, Hirche H, John V, Buddenbrock B, Gocke P, Wiebringhaus R, Konietzko N, Langer R
Central Institute of Diagnostic Radiology, University Hospital of Essen, Germany.
Eur Radiol. 1997;7(4):576-82. doi: 10.1007/s003300050209.
The aim of this work was to examine the influence of the filter kernel size on the detectability of differing radiological findings in interstitial lung disease. In 97 patients with confirmed pulmonary fibrosis chest radiographs were obtained with a filmscreen system of speed class 200 and with correspondingly exposed storage phosphorous plates. The size of the filter kernel used for the image postprocessing varied between sigma 5 and sigma 70. The detectability of interstitial lung changes was evaluated independently by eight readers on the basis of a defined rating system. The results were analysed using multifactorial analysis of variance with Scheffé test at a significance level of p = 0.05. Small kernel sizes (S 5, S 10) combined with high edge enhancement were only of benefit in the imaging of septal lines, but reduced the detectability of nodular and reticular structures. Good detail detectability of both micronodules and septal lines was obtained with a medium kernel size of sigma 40. Storage phosphor radiography utilizing the appropriate choice of postprocessing parameters provides equivalent image quality for evaluating interstitial lung changes compared with a modern filmscreen technique.
这项工作的目的是研究滤波核大小对间质性肺疾病中不同放射学表现可检测性的影响。对97例确诊为肺纤维化的患者，使用速度等级为200的屏-片系统获取胸部X线片，并相应地对存储磷光板进行曝光。用于图像后处理的滤波核大小在σ5至σ70之间变化。八位阅片者根据既定的评级系统独立评估间质性肺改变的可检测性。使用多因素方差分析和谢费检验对结果进行分析，显著性水平为p = 0.05。小核大小（S5、S10）与高边缘增强相结合仅在间隔线成像中有益，但会降低结节状和网状结构的可检测性。使用σ40的中等核大小可获得对微小结节和间隔线良好的细节可检测性。与现代屏-片技术相比，利用适当选择后处理参数的存储磷光体X线摄影在评估间质性肺改变方面提供了同等的图像质量。
