Specification, modelling and visualization of arbitrarily shaped cut surfaces in the volume model

So far, exploration of volume models is limited to cut planes or addition/removal of segmented objects. More capable exploration techniques are needed in order to allow a ‘look and feel’ close to a real dissection. This is especially important for applications like the simulation of osteotomy surgery. Therefore, we have developed methods for free-form volume-sculpting operations which allow the interactive specification, representation and high-quality rendering of free form regions. The novelty of this approach is that these regions are represented within the generalized-voxel-model, together with a simulation of the partial-volume-effect, which allows a sub-voxel localization of cut surfaces. These techniques are implemented in our VOXEL-MAN visualization system, thus enhancing the exploration techniques for volume data. Furthermore, we developed an extended ray-casting algorithm for 3D-visualization of object motion with detection and visualization of interpenetrating volumes. These methods together provide a powerful tool for volume exploration and applications like the rehearsal of surgical interventions.