Last February we launch the beta version of Speaking Image. Speaking Image has been developed by http://www.2mdc.com in collaboration with Fundación General CSIC (General Foundation of the Spanish Research Council - http://www.fgcsic.es/) as part of a general agreement to develop Open Source tools for the R&D community. The Fundación General CSIC seeks to promote quality research and lend its support and tools to researchers right from the early stages in their scientific careers.
Speaking Image allows users to upload high-resolution images, it creates a navigable map out of them, provides a set of tools to add information over specific areas of the image and allows for interaction with other users through standard social network tools. CMS are based on Drupal and there is a Open Layer component to annotation images.
For healthcare, Speaking image has great benefits as a colaborative tool for Universities, Medical research, Image archiving and many more.
More info here on Drupal Site. Also, there are a functional version of Speaking Image here.