KAMEDIN is a teleradiology project of "Deutsche Telekom". ISDN based image transfer, visualisation and online-presentation of digital radiological images is performed. In this study the suitability of the KAMEDIN-system has been tested in a clinical environment. The software has been adapted to the requirements of radiological image visualisation. During 6 months over 50 conferences took place with an average of 36 CT-slices per patient. The amount of time was approximately 10 min for conference preparation, 20 min for image transfer and 8 min for conferencing. Software problems occurred and were solved. Image quality on the monitor as well as online presentation including "simultaneous cursors" showed high performance and achieved high acceptance by the clinicians. Thus KAMEDIN is a useful teleradiology system, especially if the system is adapted to the requirements of radiology departments.