Guilbeau J C, Mazoyer B M, Pruvost P, Verrey B, Grenier P
Service de Radiologie, Hôpital Beaujon, Clichy, France.
AJR Am J Roentgenol. 1988 May;150(5):1007-10. doi: 10.2214/ajr.150.5.1007.
The effectiveness of a shaped filter in the detection of mediastinal and retrocardiac abnormalities on 140-kVp posteroanterior chest radiographs was measured by observer-performance testing. A set of 100 radiographs (the filtered and nonfiltered radiographs of 50 patients) were randomly selected from 1000 radiographs obtained from 500 outpatients or hospitalized patients. Five observers independently interpreted the set of radiographs, with one observer interpreting the set twice. Observer performance in detecting abnormalities in the mediastinum and the retrocardiac lung were analyzed by using receiver-operating characteristic techniques. The results indicate that the use of a filter has no significant overall diagnostic advantage (areas under the receiver-operating characteristic curves were 0.90 for the filtered radiographs and 0.89 for the unfiltered radiographs). No significant differences were found in the analysis of the various types or locations of lesions in the mediastinum.
通过观察者表现测试，测量了成形滤线器在140 kVp后前位胸部X线片上检测纵隔和心后区异常的有效性。从500名门诊患者或住院患者的1000张X线片中随机选取一组100张X线片（50名患者的滤线和未滤线X线片）。五名观察者独立解读这组X线片，其中一名观察者对该组X线片解读两次。采用接受者操作特征技术分析观察者在检测纵隔和心后区肺部异常方面的表现。结果表明，使用滤线器没有显著的总体诊断优势（接受者操作特征曲线下面积，滤线X线片为0.90，未滤线X线片为0.89）。在纵隔病变的各种类型或位置分析中未发现显著差异。
