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- Armin Kanitsar, Dominik Fleischmann, Rainer Wegenkittl, Petr Felkel, Eduard Gröller
- IEEE Visualization
- 2002

Visualization of tubular structures such as blood vessels is an important topic in medical imaging. One way to display tubular structures for diagnostic purposes is to generate longitudinal cross-sections in order to show their lumen, wall, and surrounding tissue in a curved plane. This process is called Curved Planar Reformation (CPR). We present three… (More)

- Petr Felkel, Rainer Wegenkittl, Katja Bühler
- Proceedings Computer Graphics International, 2004…
- 2004

This paper describes a new method for generating surfaces of branching tubular structures with given center-lines and radii. As the centerlines are not straight lines, the cross-sections are not parallel and well-known algorithms for surface tiling from parallel cross-sections cannot be used. Nonparallel cross-sections can be tiled by means of the… (More)

- Petr Felkel, Mario Bruckschwaiger, Rainer Wegenkittl
- Comput. Graph. Forum
- 2001

The watershed algorithm belongs to classical algorithms in mathematical morphology. Lotufo et al. 1 published a principle of the watershed computation by means of an Image Foresting Transform (IFT), which computes a shortest path forest from given markers. The algorithm itself was described for a 2D case (image) without a detailed discussion of its… (More)

- Armin Kanitsar, Rainer Wegenkittl, Petr Felkel, Dominik Fleischmann, Dominique Sandner, Eduard Gröller
- IEEE Visualization
- 2001

This paper deals with vessel exploration based on computed tomography angiography. Large image sequences of the lower extremities are investigated in a clinical environment. Two different approaches for peripheral vessel diagnosis dealing with stenosis and calcification detection are introduced. The paper presents an automated vessel-tracking tool for… (More)

- Petr Felkel, Rainer Wegenkittl, Armin Kanitsar
- SCCG
- 2001

In this paper, we describe the results of the literature re-viewfocused on the peripheral vessel segmentation in 3Dmedical datasets, acquired by Computer tomography angiography(CTA) of the human leg.The fundamental aim of such a segmentation task is arobust method for the detection of main vessels in the legthat simultaneously preserves the vessel… (More)

- Petr Felkel
- 1998

Straight skeleton (Angular Bisector Network, ABN) of a planar polygon, which can be grasped as a modiication of a planar Voronoi diagram without parabolic arcs, has been successfully used by Oliva et al. 5] as a part of a system for three dimensional reconstruction of objects from a given set of 2D contours in parallel cross sections. The algorithm itself… (More)

- Armin Kanitsar, Thomas Theußl, +11 authors Eduard Gröller
- IEEE Visualization
- 2002

We report on using computed tomography (CT) as a model acquisition tool for complex objects in computer graphics. Unlike other modeling and scanning techniques the complexity of the object is irrelevant in CT, which naturally enables to model objects with, for example, concavities, holes, twists or fine surface details. Once the data is scanned, one can… (More)

- Petr Felkel
- 2000

This paper is about computed tomography angiography based vessel exploration. Large image sequences of the lower extremities are investigated in a clinical environment. Two different approaches for peripheral vessel diagnosis dealing with stenosis and calcification detection are introduced. The paper presents an automated vessel-tracking tool for curved… (More)

- P Felkel, Fuhrmann Al, Kanitsar A, R Wegenkittl
- 2002

This paper describes our work on the reconstruction of the complex liver vessel tree. We demonstrate our method for constructing an arbitrary smooth polygonal representation based on subdivision surfaces using vessel centerlines and radii as input. 1 Introduction Surgery of the human liver is a complex task. It requires a good understanding of the patient… (More)