VolView

VolView is an intuitive, interactive system for volume visualization that allows researchers to quickly explore and analyze complex 3D medical or scientific data on a standard PC. Users can easily generate informative images and navigate the data for further analysis. 3D tools include composite and MIP volume rendering, contouring, cropping, and oblique reformatting. Segmentation can be performed, and resulting structures can be analyzed using distance, angle, surface area and volume measurement tools. Polygonal surface models can be exported for rapid prototyping.
Data exploration is enhanced through tools such as filtering, contours, measurements, histograms, animation, and annotation. Advanced users can extend VolView data processing using the simple plug-in API. Researchers can collaborate with distant colleagues by trading control between two synchronized sessions.
Note: Free for personal use (or get a 30 days trial for Pro version)