Development of Teleradiology System -A Supporting System for Consultation and Teleconference-

我们已经开发并实施了东京大学总医院和Mejirodai附属医院之间的放射图像远程放射学系统。基本系统由两个站点上的图像采集单元和图像传输单元组成。我们命名为MIG（医学成像网关）的图像采集单元由CCD数码静止相机、东芝个人电脑J3100和RGB显示器组成。灯箱上的胶片是由数码相机拍摄的，其图像分辨率超过400线（垂直和水平），具有8位（256）级。图像传输单元由每个站点上的9600bps调制解调器和两条公共电话线组成。这两个地点相距5公里。在会诊和会议之前，将图片发送到另一个站点。每张图像的传输时间约为4分钟。控制显示的命令，如分页和ROI指向，通过电话线从主机发送到本地站点。因此，在本地站点显示上发生的事情与主机站点上的显示完全相同。讨论是通过普通的电话线进行的。

We have developed and implemented a teleradiology system for radiologic images between Tokyo University Main Hospital and Mejirodai Annex. The basic system is composed of an image acquisition unit and an image transmitting unit on both sites.The image acquisition unit that we named MIG (medical Imaging Gateway) is composed of a CCD digital still camera, a Toshiba personal computer J3100, and a RGB monitor. Films on a lightbox are taken by the digital still camera, whose image resolution is more than 400 lines (both vertical and horizontal) with 8 bit (256) gradations.The image transmitting unit is composed of a 9600 bps modem and two public telephone lines on each site. The two site is 5 Km apart. Images are sent to the other site before consultation and conference. The time for transmission is about 4 minutes per an image. Commands to control display, such as paging and ROI pointing are sent from host to local site by the telephone line. Therefore what is happening on local site display is exactly the same as the display on the host site. Discussions are made through usual telephone line.