Özlem Gürvit

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Methods of direct or indirect volume rendering are well established and helpful tools for the interactive visual exploration of volumetric datasets. However, the usual display is oriented on surface information, such as the surface of volumetric objects. The actual volumetric information is difficult to interpret intuitively with solely visual methods. In(More)
Based on the VIVENDI-framework for virtual endoscopy, we present a system for the interactive and multi-modal representation of important anatomical structures for neuroendoscopic interventions. A serious problem of neuroendoscopic interventions is the possibility of injuring a blood vessel while performing endoscopic surgery inside the human brain. Besides(More)
With the recent introduction of multi-slice CT which acquire four image slices at the same time (which will increase to 16 image slices in the near future) the possible size of the generated image stack has increased tremendously. Traditional cine mode explorations of the image stack are rendered impractical by the sheer quantity of possible 1000 image(More)
Introduction: In the past years, the virtual endoscopy system VIVENDI has been developed at the computer graphics group (GRIS) of the University of Tübingen, in cooperation with the departments of neuroradiology and neurosurgery of the University Hospital Tübingen [2]. VIVENDI provides an interactive environment for the visual simulation of endoscopic(More)
Optical endoscopy suffers from several problems which increase the difficulties of a successful intervention. Among these problems are the limited spatial or depth perception, and the fish-eye effect which virtually flattens the geometry of the anatomical structures. Standard virtual endoscopy is inflicted by similar problems. In this paper, we present(More)
Die Entwicklung der MR-Technologie wird durch zahlreiche Parameter beeinflusst. Insbesondere die Erhöhung der Stärke des statischen Magnetfeldes hat sich in der Vergangenheit als erfolgreiche Methode zur Verbesserung des Signal-zu-Rausch-Verhältnisses (SNR) bewährt. Tatsächlich wurden jedoch mit der Erhöhung der Feldstärke auf 3 Tesla (3T) zahlreiche(More)
Zusammenfassung. Die Bedeutung virtueller Planungssysteme in der Medizin besonders für technisch anspruchsvolle Methoden, wie z.B. minimal-invasiven Interventionen, nimmt ständig zu. Virtuelle Endoskopie ist hierbei die Simulation endoskopischer Eingriffe unter Verwendung von Techniken der “Virtuellen Realität” und Methoden der Computer Graphik. Das(More)
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