LEARNING OBJECTIVES Describe scanning technologies and related visualization tools for rendering 3D representations from two-dimensional images. Identify alternative interfaces for interacting with 3D visualizations and collaborating using high performance networks. Describe strategies and tools for collaborative navigation and manipulation of 3D datasets at diverse sites. ABSTRACT This demonstration uses commercial data manipulation tools to render 3D models from DICOM datasets of actual patient CT scans. Tracked pinch gloves and stereo projection provide an immersive environment that allows collaborators to navigate, manipulate and view data from any perspective. Pointers, measurement tools, markers and devices for examining the data in magnified detail facilitate interaction between the viewer and the dataset. Internet2's advanced network capabilities allow these interactions with the datasets to occur in real-time between physicians at distant sites using the Access Grid or other video collaboration tools. Volumetric imaging provides intuitive and flexible visualizations for minimally invasive surgical planning and for education. The system frees physicians and students from having to mentally generate 3D representations from a series of two-dimensional images and offers views of anatomical structures that are not possible with other imaging modalities or by live or cadaveric dissection.