目的 讨论纸质打印片与激光打 印胶片对于肺内微小结节诊断准确性的 影响。方法 分别采用北京麦格莱菲医 用纸质打印机及激光打印机打印胸部CT 片。由2位放射科医师分别对胸部CT片进 行读片，读片分两次进行，每次读片分析 同一种打印介质图片，两次读片间隔三 周，记录读片结果，采用SPSS17.0统计 软件进行McNemer检验、Kappar检验及受 试者工作特征曲线(receiver operating characteristic curve, ROC)分析。结果 采用两种不同影像输出介质读片时，纸质 片诊断结果与干式激光胶片对于CT小结节 诊断二者间无显著性差异。结论 对于肺 内微小结节的诊断，纸质片诊断准确性与 干式激光胶片之间无显著性差异。

Objective To compare the diagnostic accuracy of pulmonary nodules by paper printer with that of a dry laser printer. Methods The CT images were both printed by paper printer and laser printer. Two radiologists checked the images of different media respectively for twice. The time interval was three weeks. Each time the radiologist used one way to interpret the CT images. The results were analyzed by the SPSS17.0 software and the ROC curve was painted. Results There was no significant difference between paper painter and dry laser printer for small pulmonary nodules. Conclusion For small pulmonary nodules, CT images obtained from a paper painter is similar to that from a dry laser printer.