By the early 1990s, the U.S. Army intends to implement all-digital, filmless medical imaging throughout its deployable combat health care facilities. In addition to employing imaging devices whose outputs are comprised of digital, electronic images rather than film-based images, such a system must, at a minimum, include means for storing, displaying, and transporting the resultant images in accordance with existing military doctrine. Furthermore, compatibility with fixed medical facilities, both in the continental United States (CONUS) and elsewhere, and between military services must be assured to promote continuity of care. The aim of this undertaking is to develop an understanding of the imaging needs of the U.S. Army's deployable/combat Health Services Support (HSS) system, and address these needs in a prototype Digital Imaging Network System (DINS) (also known as Picture Archiving and Communication System (PACS) or an Image Management and Communication (IMAC) System), to be integrated and evaluated by The MITRE Corporation. The prototype will undergo iterative development by subjecting it to multiple evaluations in both the laboratory and Echelon 3 environments, by military and civilian medical, scientific, and engineering personnel. This project is part of a U.S. Army Medical Research and Development Command contract to The MITRE Corporation to assess the feasibility of filmless imaging in military health care.