Schäfer C B, Sokiranski R, Strayle M, Linstedt-Hilden M, Dietz K, Deusch H, Hoffmann W, Claussen C D
Abteilung für Radiologische Diagnostik, Universität Tübingen.
Rofo. 1994 Jul;161(1):25-30. doi: 10.1055/s-2008-1032487.
The aim of the present study was to evaluate supine chest radiographs obtained by DLR for the diagnosis of pleural and parenchymatous changes and to compare the accuracy of observers in relation to their experience. 50 examinations, which had been checked by CT, were chosen. The images were examined by 7 doctors (2 non-radiologists, 5 radiologists). Our experience indicates that DLR has high specificity but low sensitivity for the diagnosis of a pneumothorax but relatively high sensitivity and low specificity for other changes (pleural effusions, atelectases and other intrapulmonary opacities). The area under the ROC curve averaged over the 7 rater was similar for these 4 entities. There were marked differences between the observers; the radiologists were considerably better than the non-radiologists. Altogether, the diagnostic value of single DLR examinations was relatively low. In indeterminate cases, additional diagnostic methods should, therefore, be used.
本研究的目的是评估双能X线吸收测定法（DLR）获得的仰卧位胸部X线片对胸膜和实质改变的诊断价值，并比较不同经验观察者的诊断准确性。选取了50例经CT检查的病例。图像由7名医生（2名非放射科医生、5名放射科医生）进行检查。我们的经验表明，DLR对气胸的诊断具有高特异性但低敏感性，而对其他改变（胸腔积液、肺不张和其他肺内混浊）具有相对较高的敏感性和较低的特异性。这4种病变在7名评估者中的ROC曲线下面积平均值相似。观察者之间存在显著差异；放射科医生的表现明显优于非放射科医生。总体而言，单次DLR检查的诊断价值相对较低。因此，在诊断不明确的病例中，应采用其他诊断方法。
