teleradiology with personal computers and ISDN

方法：利用ISDN（日本高速公用电话线路）将我院的个人计算机与合作者的计算机连接起来。第一年，我们估计了低压缩成像数据的远程放射学的可能性。30例患者的MRI影像资料均在合作单位获得。数据被压缩到75%，并存储在合作者的个人电脑中。我们通过ISDN获得数据，测量传输时间并检查图像阅读时的诊断准确性。由于这项研究，传输时间太长，所以我们明年尝试了高压缩成像数据。我们使用了我院的DICOM图像数据。这些数据被转换成JPEG图像，并压缩了30%。结果：在低压缩率下，平均每例传输时间为30分22秒，平均每例传输时间为30分22秒，平均每例传输时间为30分22秒。在本研究中，在图像的阅读中检测到所有病变。另一方面，在高压缩率下，每个病例的传输时间为7分15秒。微小病变可能会错过阅读的图像，但没有临床问题。讨论：我们的研究澄清了ISDN和个人电脑在远程放射学的实际使用。但现在，我们可以使用更快的电路，如ADSL的远程放射学。我们希望继续检验远程放射学的效率与更快的公共电路比ISDN。

Method:We connected between the personal computer at our institute and the cooperator's computer with ISDN (high speed public telephone circuit in Japan). First year, we estimated the possibility of teleradiology with low compressed imaging data. MRI imaging data of 30 cases were obtained at cooperator's institute. The data were compressed in 75 % and stored in the cooperator's personal computer. We got the data via ISDN, measured the transmission time and examined the diagnostic accuracy at reading of the images. As a result of this study, transmission time was too long, so we tried high compressed imaging data next year. We used the DICOM imaging data of our institute. These data were translate to JPEG images and compressed in 30 %. Then we measured the transmission time of MR imaging data of 15 cases (head and spine), which were sent to cooperator's computer, and examined the diagnostic accuracy of such high compressed imaging data.Result:With low compression rate, mean transmission time per one case was 30 minutes and 22 seconds. In this study, all lesions were detected in the reading of the images. On the other hand, with high compression rate, transmission time per one case was 7 minutes and 15 seconds. Tiny lesions might be missed in the reading of the images, however there were no clinical problems.Discussion:Our study clarified the practical use of ISDN and personal computers in teleradiology. But now , we can use faster circuit such as ADSL for teleradiology. We would like to continue to exam the efficacy of teleradiology with faster public circuit than ISDN.