Enabling the interactive display of large medical volume datasets by multiresolution bricking
| Autor: | Anupam Agrawal, Marco Viceconti, Debora Testi, Fulvia Taddei, Gordon Clapworthy, Feng Dong, N.J.B. McFarlane, Josef Kohout |
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| Rok vydání: | 2009 |
| Předmět: |
Computer science
business.industry Volume (computing) 020207 software engineering 02 engineering and technology External Data Representation Theoretical Computer Science Data visualization Software Hardware and Architecture Region of interest Computer graphics (images) 0202 electrical engineering electronic engineering information engineering 020201 artificial intelligence & image processing Graphics business Information Systems Graphical user interface |
| Zdroj: | The Journal of Supercomputing |
| ISSN: | 1573-0484 0920-8542 |
| Popis: | In this paper, we present an approach to interactive out-of-core volume data exploration that has been developed to augment the existing capabilities of the LhpBuilder software, a core component of the European project LHDL ( http://www.biomedtown.org/biomed_town/lhdl ). The requirements relate to importing, accessing, visualizing and extracting a part of a very large volume dataset by interactive visual exploration. Such datasets contain billions of voxels and, therefore, several gigabytes are required just to store them, which quickly surpass the virtual address limit of current 32-bit PC platforms. We have implemented a hierarchical, bricked, partition-based, out-of-core strategy to balance the usage of main and external memories. A new indexing scheme is introduced, which permits the use of a multiresolution bricked volume layout with minimum overhead and also supports fast data compression. Using the hierarchy constructed in a pre-processing step, we generate a coarse approximation that provides a preview using direct volume visualization for large-scale datasets. A user can interactively explore the dataset by specifying a region of interest (ROI), which further generates a much more accurate data representation inside the ROI. If even more precise accuracy is needed inside the ROI, nested ROIs are used. The software has been constructed using the Multimod Application Framework, a VTK-based system; however, the approach can be adopted for the other systems in a straightforward way. Experimental results show that the user can interactively explore large volume datasets such as the Visible Human Male/Female (with file sizes of 3.15/12.03 GB, respectively) on a commodity graphics platform, with ease. |
| Databáze: | OpenAIRE |
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