Research And Development Of Medical Image Teleconsultation System Base On IM

With the development of computer science and telecommunications technology, telemedicine is becoming a modern working mode for medical treatment and medical education. It's the combination of modern medicine technology, computer science and telecommunications technology. The limitation of time and space on the distribution of medical treatment resources was broken ever since. Telemedicine includes many medical subspecialties, of which teleconsultation is the most important part. The existing teleconsultation systems, some need special networks or devices, which causes systems to be expensive and limited; some based on NetMeeting, whatever by white board or application share, which can't directly operate on the medical image or can't synchronously operate in one application window; some based on C/S, which can't provide with P2P connection; hence the systems can not be used widely.Accordingly, How to achieve real-time audio & video transfer through internet is the emphasis of this essay.Firstly, Instant Message (IM) Technology was introduced from several aspects, such as concept, working principle, communication models, etc. Secondly, four alternative key technologies were introduces for MPEG-4 data compress arithmetic: Extraction of video object, VOP, Scalability, Motion Estimation and Compensation. VLBV (Very Low Bit-rate Video) was selected to compress our data and then result is better. Thirdly, this essay will tell you in detail the real-time network transport protocols UDP based on P2P and it's advantages.Finally, this essay explains how to implement teleconsultation system from three steps: request, response and teleconsultation. The new system improves usability and decreases the cost of devices and communication. The effect is good.