Non-Photorealistic Computer Graphics Library

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Found 7 item(s) authored by "Christian Tietjen" Find Author on Google.

Proceedings Combining Silhouettes, Surface, and Volume Rendering for Surgery Education and Planning
Christian Tietjen, Tobias Isenberg, Bernhard Preim.
Eurographics / IEEE VGTC Symposium on Visualization (EUROVIS 2005), pp. 303--310, Leeds, UK, June 1-3, 2005. [BibTeX]

Proceedings Curvature- and Model-Based Surface Hatching of Anatomical Structures Derived from Clinical Volume Datasets
Rocco Gasteiger, Christian Tietjen, Alexandra Baer, Bernhard Preim.
Proceedings of Smart Graphics, pp. 255--262, 2008. [BibTeX]

Proceedings Enhancing Slice-based Visualizations of Medical Volume Data
Christian Tietjen, Björn Meyer, Stefan Schlechtweg, Bernhard Preim, Ilka Hertel, Gero Strauß.
IEEE/Eurographics Symposium on Visualization (EUROVIS'06), pp. 123-130, IEEE, 2006. [BibTeX]

Article GPU-based smart visibility techniques for tumor surgery planning

Author(s): Christoph Kubisch, Christian Tietjen, Bernhard Preim.
Article: International Journal of Computer Assisted Radiology and Surgery, Vol. 5, No. 6, pp. 667--678, 2010.
[BibTeX] [DOI] Find this paper on Google

Purpose The rating of distances and infiltrations to vital structures is important for the planning of tumor surgery or interventional procedures. To support such an assessment, the target structures should be clearly emphasized in a 3D visualization by ensuring their visibility. Methods Smart Visibility techniques such as Ghosting Views and Breakaway Views are employed. Ghosting Views highlight focus structures by fading out occluding structures and are often used in anatomical illustrations. Breakaway Views reveal the structure by cutting into surrounding structures. As a result, an intersection surface is created that allows relating the focus structure with its surroundings. In this contribution, a specialized GPU-based implementation of these techniques is presented for polygonal models derived from a segmentation of the anatomical structures. Results We present different rendering styles of the techniques and apply them to highlight enlarged lymph nodes in the neck, as well as tumors inside the liver. Compared to other methods, we focus on polygonal models and optimizations. Thus, very high frame rates could be achieved on consumer graphics hardware. Furthermore, we employed markers that support the estimation of distances within the scene and possible infiltrations around the focus structures. Conclusion The parameters for the techniques are defined automatically to aid the employment in clinical routine. Such an application is also supported by the combination and refinement of established rendering techniques.

Proceedings Hardware-Accelerated Illustrative Medical Surface Visualization with Extended Shading Maps
Christian Tietjen, Roland Pfisterer, Alexandra Baer, Rocco Gasteiger, Bernhard Preim.
Proceedings of the 9th International Symposium on Smart Graphics (SG'08), pp. 166--167, Springer-Verlag, 2008. [BibTeX]

Proceedings Hardware-accelerated Stippling of Surfaces derived from Medical Volume Data
Alexandra Baer, Christian Tietjen, Ragnar Bade, Bernhard Preim.
Eurographics/IEEE-VGTC Symposium on Visualization, pp. 235--242, 2007. [BibTeX]

Proceedings NPR, Focussing and Emphasis in Medical Visualizations
Bernhard Preim, Christian Tietjen, Christina Dörge.
In Simulation und Visualisierung 2005. SCS, 2005. [BibTeX]

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