Reponen J, Lähde S, Tervonen O, Ilkko E, Rissanen T, Suramo I
Department of Diagnostic Radiology, University Hospital of Oulu, Finland.
Eur J Radiol. 1995 Mar;19(3):226-31. doi: 10.1016/0720-048x(94)00602-9.
A teleradiology link based on standard personal computers and a flat-bed CCD scanner was tested. A 64 kbit/s dial-up digital ISDN telephone line was used for transmission. A total of 254 films (174 uncompressed, 80 compressed) were sent. Ninety-six per cent of the uncompressed images and 98% of the compressed images were considered technically acceptable. The total diagnostic agreement between the acceptable transmitted images and the original films was 98%. Image quality was sufficient for diagnosis in CT and conventional chest and bone radiographs. However, a 256-step gray scale of the scanner was not sufficient for demanding situations, such as overexposed images with a high contrast gradient. The average speed of transmission was 60 kbit/s, which was considered adequate. The tested system suggests that a teleradiology link based on standard personal computers and programs works in situations where instant consultation is needed. However, the image digitization time with the prototype system was quite long, and a better user interface is under development.
对基于标准个人计算机和平板CCD扫描仪的远程放射学链接进行了测试。使用一条64 kbit/s的拨号数字ISDN电话线进行传输。总共发送了254张胶片（174张未压缩，80张压缩）。96%的未压缩图像和98%的压缩图像在技术上被认为是可接受的。可接受的传输图像与原始胶片之间的总体诊断一致性为98%。图像质量足以用于CT以及传统胸部和骨骼X光片的诊断。然而，扫描仪的256级灰度对于要求较高的情况（如具有高对比度梯度的过度曝光图像）是不够的。平均传输速度为60 kbit/s，被认为是足够的。测试系统表明，基于标准个人计算机和程序的远程放射学链接在需要即时会诊的情况下是可行的。然而，原型系统的图像数字化时间相当长，并且更好的用户界面正在开发中。
