Telemedicine includes all medical activities in diagnosis, therapeutic
s or social medicine undertaken by means of an electronic transfer med
ium, thereby enabling the transmission of visual and acoustic informat
ion in these fields over long distances without the doctor being perso
nally present at the requested consultation. Most experience in teleme
dicine has been gathered in diagnosis, especially with respect to tele
radiology and telepathology; however, an increasing number of institut
ions have obtained experience in teledermatology, telepsychiatry, tele
cardiology, telesurgery, etc. The quality of the transmitted images is
adequate for diagnostic application. However, the transfer rates of n
ormal telephone lines are not satisfactory and these telephone nets wi
ll be replaced by ISDN and broad band or satellite connections in the
near future. The lack of uniform transfer standards is the most import
ant constraint in telepathology. This fact is one explanation for the
fast growth of the Internet, which is based on unified transmission st
andards. The rapid expansion of telemedicine is inevitable and the inc
reased use of this tool will induce profound changes in the medico-soc
ial environment. Then is a fear of institutional concentration, at the
expense of small institutions. This development can be minimised by a
ugmenting the scope to encompass telemedicine in all interdisciplinary
fields, with the consequent full integration of small institutions. T
elemedicine is an appropriate technique for quality assurance in all a
reas of medicine, since it permits simultaneous ''soft'' quality contr
ol, in conjunction with assumption of co-responsibility by the control
institution.