Development of WWW-based TelePACS using satellite data communication system

In this paper, we present the WWW (World-Wide-Web)-based TelePACS, which uses the communication network as Asymmetric Satellite Data Communication System (ASDCS). Web-based TelePACS is implemented with JAVA language. Through the Internet, Web-based TelePACS can make it possible for remote hospital or doctor to access PACS data and information easily and cheaply. The ASDCS uses receive-only satellite links for data delivery and PSTN (Public Switched Telephone Network) modem or N-ISDN (Narrow band Integrate Services Digital Network) for communication. The satellite communication linking shows the very high-speed performance such as 10-30 times faster than the modem linking. To solve the speed limits of Internet, JPEG and wavelet compression methods were adapted in WWW-based TelePACS and were evaluated by PSNR (Peak Signal-to-Noise Ratio) and by radiological experts that 10:1 or less JPEG and wavelet compression may be acceptable for diagnostic purposes. Consequently, we get the conclusion that our system is suitable for teleradiology and telemedicine world wide.