Development of diagnostic image database shared on the Internet

本研究的目的是开发一个多媒体资料库系统，可以利用网际网路来累积和分享对教育、研究和影像诊断有用的医学资料。我们在九州大学健康科学学院安装了多媒体服务器，远程医疗和牙科机构可以全天使用。可以在服务器上创建多个数据库，并通过设施的客户端计算机向其注册图像、声音和视频等多媒体数据。在本研究中，我们建立了几个用于教育、研究和影像诊断的数据库。其中一个数据库是九州大学牙科学系职工注册的口腔颌面放射学教学档案。诊断报告附在图像上，可以通过报告的关键词进行搜索。研究了网络使用中的安全问题以及图像压缩对诊断的影响。我们使用防火墙来保护我们的局域网（局域网），包括服务器和学生的电脑不被破解。发现JPEG（联合摄影编码专家组）压缩率为1/20可用于口腔放射学的图像诊断。我们还开发了一个计算机辅助教学系统，包括一个视频流服务器和一个WWW服务器。医学技术教育的视频资料存储在视频服务器上，在我们的局域网上播出。41名学生可以根据需要在他们的电脑显示器上反复观看视频，并使用基于WWW的报告系统编写报告。将该体系应用于护理基础技能教育时，117名护生中有88%的人表示他们更喜欢这种教学方式。证实了多媒体数据库在医学教材制作中的作用，计算机辅助教学在医学技术教育中的效果。

The purpose of this study is to develop a multimedia database system that can accumulate and share the useful medical data for education, research and image diagnosis using the Internet. We installed a multimedia server at Kyushu University School of Health Sciences, which can be used by remote medical and dental facilities the whole day. Multiple databases can be created on the server and multimedia data such as images, sounds and videos are registered with them by the client computers of the facilities. In this study we made several databases for education, research and image diagnosis. One of the databases is the teaching file of oral and maxillofacial radiology, which was registered by the staff of the department of dentistry, Kyushu University. The diagnostic reports were attached on the images, which could be searched by the key words of the reports. The security problem in using the Internet and the effect of image compression on the diagnosis were also investigated. We used a firewall to protect our LAN (Local Area Network) including the servers and students' computers from cracking. JPEG (Joint Photographic coding Experts Group) compression of 1/20 was found to be acceptable for image diagnosis of the intra-oral radiology. We also developed a computer-assisted instruction system including a video-streaming server and a WWW server. The video materials for the education of medical technology were stored in the video server and broadcasted on our LAN.Forty-one students can repeatedly see the video on their computer monitor, as need be, and write reports using a WWW based reporting system. When we applied the system to the education of basic nursing skills, 88% of the 117 nursing students answered that they preferred this kind of instruction. It was confirmed that the multimedia databases were useful for making the educational materials in medicine and the computer-assisted instruction was effective in the education of medical technology.