2 results
Search Results
Now showing 1 - 2 of 2
Item State-of-the-Art Computer Graphics in Neurosurgical Planning and Risk Assessment(The Eurographics Association, 2007) Köhn, Alexander; Weiler, Florian; Klein, Jan; Konrad, Olaf; Hahn, Horst; Peitgen, Heinz-Otto; Paolo Cignoni and Jiri SochorWe present a novel software assistant that unlocks new potentials in neurosurgical planning and risk assessment. It allows surgeons to approach the task in an intuitive manner, by providing them with the possibility to simultaneously observe all relevant data of a case in synchronized 2D and 3D views. State-of-the-art technologies from the field of computer graphics are combined to allow simultaneous interactive rendering of anatomical and functional MR data in combination with manually segmented objects and slice-based overlays. This allows surgeons to perceive a clearer impression of the anatomical and functional structures affected by an intervention, and especially the way they are related to each other. Thus, it significantly facilitates the finding of an optimal intervention strategy.Item Simultaneous Visualization of Preoperative Planning Models and Intraoperative 2D Ultrasound for Liver Surgery(The Eurographics Association, 2007) Hansen, Christian; Köhn, Alexander; Zidowitz, Stephan; Peitgen, Heinz-Otto; Ritter, Felix; Paolo Cignoni and Jiri SochorThis paper introduces new techniques for simultaneous visualization of preoperative planning models and intraoperative 2D ultrasound for open liver surgery. The driving motivation for our work is to improve the visual presentation of a moving ultrasound plane within a complex, interweaving three-dimensional model of hepatic vascular structures. Major drawbacks of existing systems are occlusions of the ultrasound plane by the planning model and fade-out of crucial context information. Our system allows the surgeon to focus on the ultrasound image while perceiving context-relevant planning information without discarding important morphological information and depth cues. The contribution of this paper is a GPU-accelerated rendering pipeline including new illustrative visualization algorithms for focus & context rendering, distance and intersection accentuation, as well as a hybrid technique for high quality silhouette and hatching stroke generation.