Hayrapetian A, Aberle D R, Huang H K, Fiske R, Morioka C, Valentino D, Boechat M I
Department of Radiological Sciences, UCLA Medical Center 90024-1721.
AJR Am J Roentgenol. 1989 May;152(5):1113-8. doi: 10.2214/ajr.152.5.1113.
Observer performance tests were conducted to compare the effects on diagnostic accuracy of digital hard copy and video display formats versus conventional radiographic film. Digital images were obtained by digitizing conventional chest radiographs to a 2048 x 2048 matrix with a laser film scanner. Three digital display formats were used: laser-printed digital film, a 2048-line video monitor without user interaction, and a 2048-line video monitor with user interaction. Thirty-one posteroanterior chest radiographs, determined by consensus of four thoracic radiologists to contain septal lines (n = 11), parenchymal nodules (n = 7), nodules and septal lines (n = 7), or neither abnormality (n = 6), were used for the study. Images were interpreted by four radiologists in four separate viewing sessions. Diagnostic accuracy was determined by receiver-operating characteristic analysis for each observer with each viewing technique. No statistical differences in diagnostic accuracy, determined by the area under the receiver-operating-characteristic curve, were found between the analog film, the digital film, and the two video digital display formats. This preliminary study suggests that 2048-line digital displays may be an acceptable alternative to the traditional lightbox viewing method for the perception of these two abnormalities commonly seen on chest radiographs.
进行了观察者性能测试，以比较数字硬拷贝和视频显示格式与传统射线照相胶片对诊断准确性的影响。通过使用激光胶片扫描仪将传统胸部X光片数字化为2048×2048矩阵来获取数字图像。使用了三种数字显示格式：激光打印数字胶片、无用户交互的2048线视频监视器和有用户交互的2048线视频监视器。由四位胸科放射科医生一致认定的31张后前位胸部X光片用于该研究，这些片子包含间隔线（n = 11）、实质结节（n = 7）、结节和间隔线（n = 7）或无异常（n = 6）。图像由四位放射科医生在四个独立的观察环节中进行解读。通过对每位观察者使用每种观察技术进行接收者操作特征分析来确定诊断准确性。通过接收者操作特征曲线下的面积确定，在模拟胶片、数字胶片和两种视频数字显示格式之间，未发现诊断准确性存在统计学差异。这项初步研究表明，对于胸部X光片中常见的这两种异常的观察，2048线数字显示可能是传统观片灯观察方法的可接受替代方案。
