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3D quantification visualization of vascular structures in magnetic resonance angiographic images

International conference on Computational Science

作者： Schaap, JA de Koning, PJH Janssen, JP Westenberg, JJM van der Geest, RJ Reiber, JHC Leiden Univ Med Ctr Dept Radiol Div Image Proc Leiden Netherlands

ISBN: (纸本)3540435948

This paper describes a new method to segment vascular structures in 3D MRA data, based on the Wavefront Propagation algorithm. The center lumen line and the vessel boundary are detected automatically. Our 3D visualization and interaction platform will be prestended, which is used to aid the phycisian in the analysis of the MRA data. The results are compared to conventional X-ray DSA which is considered the current gold-standard. Provided that the diameter of the vessel is larger than 3 voxels, our method has similar result as X-ray DSA.

关键词： visualization

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Application of image analysis with noise removal for supercritical CO2

Application of image analysis with noise removal for supercr...

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10th International conference on Nuclear Engineering (ICONE 10)

作者： Ota, J. Sakurai, K. Okamoto, K. Madarame, H. Nuclear Engineering Research Lab. The University of Tokyo Tokai-mura Ibaraki 319-1188 Japan

ISBN: (纸本)9784888982566

It is very important to understand the thermo-fluid characteristics of supercritical fluid, for the development of advanced supercritical water cooled nuclear reactor. In this study, visualization experiment for forced convection of the supercritical fluid was carried. Using the measured images with cross-correlation technique, the velocity distribution was obtained. To reduce the error of the reconstructed data, novel approach for the image analysis and advanced visualization technique was applied. For the visualization technique, the frame straddling was applied with infrared pulse laser. The temporal and spatial noise removal procedure was developed for the image analysis.

关键词： Supercritical fluids

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Volume visualization of 5D sedimentation models

Volume visualization of 5D sedimentation models

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conference on visualization and data analysis 2002

作者： Vickery, RJ Keen, TR Moorhead, RJ Brou, RJ Carruth, DW Doane, SM Mississippi State Univ Engn Res Ctr Mississippi State MS 39762 USA

ISBN: (纸本)0819444057

We implemented a hybrid immersive visualization system for a five dimensional (5D) coupled bottom boundary layer-sedimentation model. This model predicts sediment resuspension, transport, and resulting distributions for shallow water regions on continental shelves. One variable of interest, suspended sediment concentration (SSC), is 51) and varies by longitude, latitude, depth, time, and grain size. At each grid point there are twenty values for SSC, representing grain sizes ranging from 2.36 to 3306 mum. Currently the most common methods of analyzing the SSC distribution are only 2D, e.g., point profiles, cross-sections, map views at equal water depths, and time series. Traditional methods require multiple sets of plots that are analyzed manually. Good 3D methods are needed that will allow researchers to investigate the complex relationships between variables and see the underlying physical processes more comprehensively, especially within the wave boundary layer close to the ocean bottom. This paper presents the work in progress on the motivation, requirements, and overall design of the visualization system, along with the latest efforts to incorporate volume visualization as an effective means of understanding the SSC variable. The system is optimized for deployment in a CAVE. We also describe the extension of this system to other problem domains.

关键词： volume visualization texture synthesis texture generation sedimentation

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visualization of coregistered imagery for remote surface operations

Visualization of coregistered imagery for remote surface ope...

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2003 IEEE Aerospace conference

作者： Powell, Mark W. Brackes, Paul G. Vona, Marsette A. Norris, Jeffrey S. Jet Propulsion Laboratory California Institute of Technology Pasadena CA United States

ISBN: (纸本)078037651X

This work discusses various techniques used in visualizing sets of coregistered images for planetary lander or rover mission operations. Imagery from all available instrumentation on board a planetary rover or lander is useful in science analysis of a remote landing site. We use a visualization technique called data fusion to expedite analyzing data from an instrument suite. data fusion uses coregistration information to overlay images from different instruments together. These overlay images are then presented to the scientist in both 2D and 3D visualization tools. Next, we introduce a technique for panorama visualization that is based on a spherical warp operation. This warping technique is optimized for computational efficiency in order to run dynamically and to support a 2D or 3D visualization tool. We then present some results of the implementation of these techniques for the 2003 MER Science Activity Planner software, using image data from the 2002 FIDO-MER field test. We conclude with a discussion of future directions for these visualization techniques. © 2003 IEEE.

关键词： visualization

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A PACS-based interface for 3D anatomical structures visualization and surgical planning

A PACS-based interface for 3D anatomical structures visualiz...

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Medical Imaging 2002 conference

作者： Koehl, C Soler, L Marescaux, J IRCAD EITS F-67091 Strasbourg France

ISBN: (纸本)081944426X

The interpretation of radiological image is routine but it remains a rather difficult task for physicians. It requires complex mental processes, that permit translation from 2D slices into 3D localization and volume determination of visible diseases. An easier and more extensive visualization and exploitation of medical images can be reached through the use of computer-based systems that provide real help from patient admission to post-operative follow-up. In this way, we have developed a 3D visualization interface linked to a PACS database that allows manipulation and interaction on virtual organs delineated from CT-scan or MRI. This software provides the 3D real-time surface rendering of anatomical structures, an accurate evaluation of volumes and distances and the improvement of radiological image analysis and exam annotation through a negatoscope tool. It also provides a tool for surgical planning allowing the positioning of an interactive laparoscopic instrument and the organ resection. The software system could revolutionize the field of computerized imaging technology. Indeed, it provides a handy and portable tool for pre-operative and intra-operative analysis of anatomy and pathology in various medical fields. This constitutes the first step of the future development of augmented reality and surgical simulation systems.

关键词： surgical simulation and training pre- and intra-operative imaging/visualization real-time 3D visualization medical data storage

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3D X-ray scan visualization and analysis system

3D X-ray scan visualization and analysis system

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International conference on X-ray and Neutron Capillary Optics

作者： Markelov, AA Inst Roentgen Opt Moscow 123060 Russia

ISBN: (纸本)0819445320

While processing experimental data, it is important to have pictorial presentation of information. Currently, within the scope of the research programs carried out at the Institute for Roentgen Optics, several automated set-ups have been created and are now used to perform X-ray scanning experiments. At the development stage it became clear that presentation of experimental data in a pictorial and convenient to the researcher form, by means of 3D computer graphics algorithms, enables more precise evaluation of the results and, thus, correctly determination of the strategy for further research.

关键词： x-ray scanning visualization 2D array 3D array

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visualization of high dynamic range images

Visualization of high dynamic range images

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International conference on Image Processing (ICIP'02)

作者： Pardo, Alvaro Sapiro, Guillermo IMERL and IIE Facultad de Ingenieria Universidad de la Republica C.C. 30 Montevideo Uruguay Electrical and Computer Engineering University of Minnesota Minneapolis MN 55455 United States

A novel paradigm for information visualization in high dynamic range images is presented in this paper. These images, real or synthetic, have luminance with typical ranges many orders of magnitude higher than that of standard output devices, thereby requiring some processing for their visualization. In contrast with existent approaches, which compute a single image with reduced range, close in a given sense to the original data, we propose to look for a representative set of images. The goal is then to produce a minimal set of images capturing the information all over the high dynamic range data, while at the same time preserving a natural appearance for each one of the images in the set. A specific algorithm that achieves this goal is presented and tested on natural and synthetic data.

关键词： Image analysis

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visualization of plant growth

Visualization of plant growth

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Proceedings of the 1997 IEEE visualization conference

作者： Loomis, Jeremy J. Liu, Xiuwen Ding, Zhaohua Fujimura, Kikuo Evans, Michael L. Ishikawa, Hideo Ohio State Univ Columbus United States

Measurement, analysis, and visualization of plant growth is of primary interest to plant biologists. We are developing software tools to support such investigation. There are two parts in this investigation, namely, growth visualization of (i) a plant root and (ii) a plant stem. For both domains, the input data is a stream of images taken by cameras. The tools being developed make it possible to measure various time-varying quantities such as differential growth. For both domains, the plant is modeled by using flexible templates to represent nonrigid motions.

关键词： Image processing

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Manifold Learning for Premature Ventricular Contraction Detection

Manifold Learning for Premature Ventricular Contraction Dete...

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35th Annual conference on Computers in Cardiology

作者： Ribeiro, B. R. Henirques, J. H. Marques, A. M. Antunes, M. A. DEI FCTUC Dept Informat Engn P-3030290 Coimbra Portugal Univ Coimbra Dept Informat Engn CISUC Coimbra Portugal Univ Coimbra Dept Cardiothorac Surg P-3000 Coimbra Portugal

ISBN: (纸本)9781424437061

Prompt diagnosis of abnormally shaped waveforms in ECG signal is an important component in the early diagnosis of cardiac arrhythmias, improving the quality of life of patients. Meanwhile, detection models for Premature Ventricular Contractions (PVC) are widely investigated, a less studied problem is data analysis and visualization. In this paper, we propose an approach for PVC detection and data visualization by exploiting the intrinsic geometry of the high-dimensional data using manifold learning and Support Vector Machines (SVM). ISOMAP forms a neighborhood-preserving projection which allows to uncover the low-dimensional manifold and is used here as a pre-processing step. Then by incorporating training labels the method is capable of recognizing PVC patterns with comparable accuracy of kernel learning machines.

关键词： data visualization

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Distributed, on-demand, data-intensive and collaborative simulation analysis

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FUTURE GENERATION COMPUTER SYSTEMS-THE INTERNATIONAL JOURNAL OF ESCIENCE 2003年第6期19卷 849-859页

作者： Breckenridge, A Pierson, L Sanielevici, S Welling, J Keller, R Woessner, U Schulze, J Sandia Natl Labs Albuquerque NM 87185 USA Pittsburgh Supercomp Ctr Pittsburgh PA USA Ctr High Performance Comp Stuttgart Germany

Distributed, on-demand, data-intensive, and collaborative simulation analysis tools are being developed by an international team to solve real problems such as bioinformatics applications. The project consists of three distinct focuses: compute, visualize, and collaborate. Each component utilizes software and hardware that performs across the International Grid. Computers in North America, Asia, and Europe are working on a common simulation programs. The results are visualized in a multi-way 3D visualization collaboration session where additional compute requests can be submitted in real-time. Navigation controls and data replication issues are addressed and solved with a scalable solution. Published by Elsevier B.V.

关键词： compute visualize collaborate data-intensive simulation analysis bioinformatics applications

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