VCBM 12: Eurographics Workshop on Visual Computing for Biology and Medicine

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https://diglib.eg.org/handle/10.2312/464

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Browsing VCBM 12: Eurographics Workshop on Visual Computing for Biology and Medicine by Subject "Applications"

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    On the Value of Multi-Volume Visualization for Preoperative Planning of Cerebral AVM Surgery
    (The Eurographics Association, 2012) Weiler, Florian; Rieder, Christian; David, Carlos A.; Wald, Christoph; Hahn, Horst K.; Timo Ropinski and Anders Ynnerman and Charl Botha and Jos Roerdink
    Surgical treatment of cerebral arteriovenous malformations (AVMs) requires thourough preoperative planning for the intervening neurosurgeon. The goal of such planning is to gain a precise understanding of the patho-anatomy of the malformation, specifically about the location and spatial relation of normal and abnormal structures. A key element in this process is the identication and localization of arteries feeding into the lesion, and veins draining it. In this paper, we demonstrate how state-of-the-art techniques from the field of computer graphics and image processing can support neurosurgeons with this task. We address the problem by merging multiple angiographic image sets within a 3D volume rendering pipeline. Datasets from clinical imaging studies were remotely processed at our institute, returned to the institution of origin, and finally visualized in an interactive application, allowing the neurosurgeon to explore the different images simultaneously. Here, we present three case studies along with the medical assessment of an experienced neurosurgeon.
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    Tractography in Context: Multimodal Visualization of Probabilistic Tractograms in Anatomical Context
    (The Eurographics Association, 2012) Berres, Anne; Goldau, Mathias; Tittgemeyer, Marc; Scheuermann, Gerik; Hagen, Hans; Timo Ropinski and Anders Ynnerman and Charl Botha and Jos Roerdink
    Multi-modal display of neurological data in anatomical context is a challenging issue in biomedical visualization. We present an application-driven approach, which solves the visibility issues arising from the simultaneous presentation of probabilistic tractograms and anatomical context. The tractogram (a scalar field indicating a connectivity score between voxels) is visualized by nested surface layers, providing an overview of long-range connectivity. Unique dataset features are reflected by value-based opacity and further enhanced by depth cues. An illustrative, three-dimensional rendering of the cortex complemented with textured slices is provided as anatomical context. The presented methods are based on a detailed requirements analysis with domain experts. Two user studies were performed to evaluate our methods and the techniques were improved based on their feedback. Our methods can be applied to a wide range of data, as they can be adapted to the range and requirements of data very easily.