Peer S, Peer R, Walcher M, Pohl M, Jaschke W
Department of Radiology, University Hospital, Anichstrasse 35, A-6020 Innsbruck, Austria.
Eur Radiol. 1999;9(8):1693-6. doi: 10.1007/s003300050911.
The aim of this study was comparative analysis of rejected radiographs in conventional and digital radiology under the aspects number of rejected images and reasons for rejection. During 2 months waste films of conventional radiography were collected; in digital radiography each image-delete command at the postprocessing workstation was documented. Rejected images were analysed and assigned to four categories. The overall reject rate was 27.6% in the conventional and 2.3% in the digital department. Whereas in the conventional department the main reason for rejection was "exposure" and "others" (i.e. problems related to film handling), the main reason in the digital environment was "positioning". The high exposure tolerance of digital systems markedly reduces the amount of faulty images. This is not only economically rewarding, but may also reduce unnecessary X-ray exposure of patients due to image retake.
本研究的目的是从被拒收影像的数量和拒收原因方面，对传统放射学和数字放射学中被拒收的射线照片进行比较分析。在2个月的时间里，收集了传统放射摄影的废片；在数字放射学中，记录了后处理工作站的每个图像删除指令。对被拒收的图像进行分析并分为四类。传统科室的总体拒收率为27.6%，数字科室为2.3%。在传统科室，拒收的主要原因是“曝光”和“其他”（即与胶片处理相关的问题），而在数字环境中，主要原因是“定位”。数字系统的高曝光容忍度显著减少了错误图像的数量。这不仅在经济上有益，还可能减少因重新拍摄图像而导致的患者不必要的X射线照射。
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