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 imple-mented 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 WWWbased
TelePACS and were evaluated by PSNR (Peak
Signal-to-Noise Ratio) and by radiological experts that
1O:l or less JPEG and Wavelet compression may be
acceptable for diagnostic purposes. Consequently, we get
the conclusion that our system is suitable for tele-radiology
and telemedicine world widely.
1. Introduction