they are very expensive for the use of real communication
network.
To overcome these problems of speed limits of Internet,
we had developed the medical image compression tools
using JPEG and Wavelet Methods and Asymmetric
Satellite Data Communication System (ASDCS) and
WWW-based TelePACS employing ASDCS. ASDCS was
evaluated by the transmission speed and image
compression tools were evaluated by PSNR (Peak Signalto-
Noise Ratio) algorithm and by visual tests of
radiological experts.