Abstract: A multimodality image manipulation and analysis software called OSIRIS was developed at the University Hospital of Geneva. This software package is currently used on different hardware platforms as part of a hospital-wide PACS project. An extension of this software was recently designed to allow cooperative work on remotely located workstations. This extension was developed to allow remote consultations and communications between physicians over local and wide area networks. For teleradiology and cooperative consultations, images are exchanged between the different workstations in an ACR-NEMA based format called PAPYRUS. The interactive session can then take place where the communication protocol between the two remote stations allows for simultaneous manipulation of the same images and a live conversation through a vocal link. A special communication protocol was developed to transmit the different actions performed on one station to the other. The lower level communication protocol is TCP-IP. In addition to the local usage in Geneva, this platform was also adopted as part of a European teleradiology project called TELEMED, regrouping 17 partners from 9 different countries. It is being tested on international broadband networks for remote consultations between different countries in Europe. !5
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