Kehler M, Albrechtsson U, Andrésdóttir A, Hochbergs P, Lárusdóttir H, Lundin A, Lönntoft M
Department of Diagnostic Radiology, University Hospital, Lund, Sweden.
Acta Radiol. 1991 Nov;32(6):442-8.
Inverted (positive) digital chest radiographs of patients with lung tumors were compared with commonly used (negative) digital images, consisting of one simulated normal and one contrast enhanced image. The first part of the material consisted of 80 patients of whom 40 had tumors and 40 were normal. Five radiologists with different experience reviewed the examinations. From their answers, ROC curves were constructed. The second part of the material consisted of 100 chest phantom examinations with a simulated tumor in the mediastinum (45 examinations) and/or the left lung (46 examinations). In 31 exposures there was no abnormality. These were reviewed by 3 observers and performed as an ROC study as well. There was no statistical difference between the different types of images or between the observers in the 2 studies.
将肺癌患者的倒置（正位）数字化胸部X光片与常用的（负位）数字化图像进行比较，后者包括一张模拟正常图像和一张对比增强图像。材料的第一部分包括80名患者，其中40名患有肿瘤，40名正常。五名经验不同的放射科医生对这些检查进行了评估。根据他们的回答绘制了ROC曲线。材料的第二部分包括100次胸部体模检查，其中模拟肿瘤位于纵隔（45次检查）和/或左肺（46次检查）。在31次曝光中没有异常。这部分由3名观察者进行评估，也作为一项ROC研究。在这两项研究中，不同类型的图像之间或观察者之间没有统计学差异。
