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检索条件"任意字段=3rd International Conference on Medical Image Computing and Computer-Assisted Intervention"

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System for medical image retrieval the MIMS model 3rd

System for medical image retrieval the MIMS model

引用

3rd international conference on Visual Information Systems, VISUAL 1999

作者： Chbeir, Richard Amghar, Youssef Flory, Andre LISI - INSA 20 Avenue A. Einstein VilleurbanneF-69621 France

ISBN: (纸本)3540660798

The multifaceted description of image data presents a couple of problems for traditional information systems designed for textual data. image databases require efficient and direct spatial search based on image objects and their relationships instead of some cumbersome alphanumeric encodings oft he images. Current systems generally approach the problem from different views. Thus, they describe one image facet dependently on application domain. This paper presents a model for medical image Management System (MIMS) that allows physicians to retrieve images and required information by combining the strengths of several approaches. Via a convivial iconic interface, our system assign to each image object a graphical representation to describe image objects and their attributes. It allows also to automatically calculate their interrelations. © Springer-Verlag Berlin Heidelberg 1999.

关键词： Search engines

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The perception of transparency in medical images 2nd

The perception of transparency in medical images

引用

2nd international conference on medical image computing and computer-assisted intervention, MICCAI 1999

作者： Kasrai, Reza Kingdom, Frederick A. A. Peters, Terry M. McConnell Brain Imaging Ctr Montreal Neurological Inst H3A 2B4 Canada McGill Vision Research Unit Royal Victoria Hospital MontrealH3A 1A1 Canada Imaging Research Labs Robarts Research Institute LondonN6A 5K8 Canada

ISBN: (纸本)354066503X

Many of the tasks performed by clinicians during surgical planning or diagnosis relyon the visualization of medical images. When information from multiple modalities is integrated, some images must be seen through others. In these cases, surfaces or volumetric images are rendered semi-opaque, or transparent. It is necessary, therefore, to understand the nature of transparencyp erception in human visual system. A set of experiments is presented which begins to look at the role of stereoscopy, spatial frequency, and multiple layers in the perception of transparent achromatic surfaces. An adjustment technique has been developed for the measurement of observer performance, and a physical and algebraic model for the perception of multiple transparent surfaces is described. The results show good agreement with the models developed. © Springer-Verlag Berlin Heidelberg 1999.

关键词： Stereo image processing

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A robust 3-D reconstruction system for human jaw modeling 2nd

A robust 3-D reconstruction system for human jaw modeling

引用

2nd international conference on medical image computing and computer-assisted intervention, MICCAI 1999

作者： Yamany, Sameh M. Farag, Aly A. Tasman, David Farman, Allan G. Computer Vision and Image Processing Laboratory University of Louisville United States School of Dentistry Univeristy of Louisville LouisvilleKY40292 United States

ISBN: (纸本)354066503X

This paper presents a model-based vision system for dentistry that will assist in diagnosis, treatment planning and surgical simulation. Dentistry requires the accurate 3-D representation of the teeth and jaws for diagnostic and treatment purposes. The proposed integrated computer vision system reconstructs a 3-D model of the patient’s dental occlusion using an intra-oral video camera. A modified shape from shading (SFS) technique, using perspective projection and camera calibration, extracts the 3-D information from a sequence of 2-D images of the jaw. Data fusion and 3-D registration techniques develop the complete jaw model. Triangulization is then performed, and a solid 3-D model is obtained via rapid prototyping. The system performance is investigated using ground truth data, and the results show sub-millimeter reconstruction accuracy. The system is shown to be robust in terms of speed and accuracy compared to current practices. © Springer-Verlag Berlin Heidelberg 1999.

关键词： image reconstruction

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Quantitation of vessel morphology from 3D MRA 2nd

Quantitation of vessel morphology from 3D MRA

引用

2nd international conference on medical image computing and computer-assisted intervention, MICCAI 1999

作者： Frangi, A.F. Niessen, W.J. Hoogeveen, R.M. Van Walsum, Th. Viergever, M.A. Heidelberglaan 100 UtrechtCX3584 Netherlands

ISBN: (纸本)354066503X

Three dimensional magnetic resonance angiographic images (3D MRA) are routinely inspected using maximum intensity projections (MIP). However, accuracy of stenosis estimates based on projections is limited. Therefore, a method for quantitative 3D MRA is introduced. Linear vessel segments are modeled with a central vessel axis curve coupled to a vessel wall surface. First, the central vessel axis is determined. Subsequently, the vessel wall is segmented using knowledge of the acquisition process. The user interaction to initialize the model is performed in a 3D setting. The method is validated on a carotid bifurcation phantom and also illustrated on patient data. © Springer-Verlag Berlin Heidelberg 1999.

关键词： Hospital data processing

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An integrated visualization system for surgical planning and guidance using image fusion and interventional imaging 2nd

An integrated visualization system for surgical planning and...

引用

2nd international conference on medical image computing and computer-assisted intervention, MICCAI 1999

作者： Gering, David T. Nabavi, Arya Kikinis, Ron Grimson, W.E.L. Hata, Noby Everett, Peter Jolesz, Ferenc Wells, William M. MIT AI Laboratory CambridgeMA United States Brigham and Women's Hospital Harvard Medical School BostonMA United States

ISBN: (纸本)354066503X

We present a software package which uniquely integrates several facets of image-guided medicine into a single portable, extendable environment. It provides capabilities for automatic registration, semiautomatic segmentation, 3D surface model generation, 3D visualization, and quantitative analysis of various medical scans. We describe its system architecture, wide range of applications, and novel integration with an interventional Magnetic Resonance (MR) scanner to augment intraoperative imaging with pre-operative data. Analysis previously reserved for pre-operative data can now be applied to exploring the anatomical changes as the surgery progresses. Surgical instruments are tracked and used to drive the location of reformatted slices. Real-time scans are visualized as slices in the same 3D view along with the pre-operative slices and surface models. The system has been applied in over 20 neurosurgical cases at Brigham and Women’s Hospital, and continues to be routinely used for 1-3 cases per week. © Springer-Verlag Berlin Heidelberg 1999.

关键词： image fusion

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Tessellated surface reconstruction from 2D contours 2nd

Tessellated surface reconstruction from 2D contours

引用

2nd international conference on medical image computing and computer-assisted intervention, MICCAI 1999

作者： Chan, Chee Fatt Kwoh, Chee Keong Teo, Ming Yeong Ng, Wan Sing School of Mechanical and Production Engineering Nanyang Technological University Nanyang Avenue 639798 Singapore School of Applied Science Computer Integrated Medical Intervention Laboratory Nanyang Technological University Nanyang Avenue 639798 Singapore

ISBN: (纸本)354066503X

This paper presents a new triangulation method to define surfaces of 3D object from parallel 2D contours. These contours represent the boundary of a human organ segmented from 2D images acquired from radiological volumetric data using ultrasound (US), computer topography (CT) and magnetic resonance (MR) imaging. Many papers have identified and looked into the problems of generating surfaces from 2D contours. They are correspondence, tiling, branching and surface-fitting problems. Our new algorithm dealt with these problems in three steps. First, several adjacent contour mapping positions are used to reveal the correspondence of contours. Second, a tessellation algorithm approximates contours into line segments. Finally, surface meshes, in the form of strips and fans, use the gradient of line segments to optimise surface quality without affecting the rendering time. © Springer-Verlag Berlin Heidelberg 1999.

关键词： Volumetric analysis

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3rd international conference on Visual Information and Information Systems, VISUAL 1999

3rd International Conference on Visual Information and Infor...

引用

3rd international conference on Visual Information Systems, VISUAL 1999

ISBN: (纸本)3540660798

The proceedings contain 101 papers. The special focus in this conference is on Visual Information Systems, Interactive Visual Query, Browsing Information Space, Internet Search Engines and Video Parsing. The topics include: Supporting image-retrieval by database driven interactive 3d information-visualization;querying multimedia data sources and databases;system for medical image retrieval;error-tolerant database for structured images;query processing and optimization for pictorial query trees;similarity search using multiple examples in mars;excluding specified colors from image queries using a multidimensional query space;generic viewer interaction semantics for dynamic virtual video synthesis;category oriented analysis for visual data mining;user interaction in region-based color image segmentation;using a relevance feedback mechanism to improve content-based image retrieval;region queries without segmentation for image retrieval by content;content-based image retrieval over the web using query by sketch and relevance feedback;task analysis for information visualization;exploiting interaction in image retrieval;visualization of information spaces to retrieve and browse image data;an architecture for using images to access and organize web information;a compact and retrieval-oriented video representation using mosaics;a visual search engine for distributed image and video database retrieval applications;a dynamic java-based intelligent interface for online image database searches;motion-based feature extraction and ascendant hierarchical classification for video indexing and retrieval;automatically segmenting movies into logical story units and scene segmentation and image feature extraction for video indexing and retrieval.

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Statistical 3D vessel segmentation using a Rician distribution 2nd

Statistical 3D vessel segmentation using a Rician distributi...

引用

2nd international conference on medical image computing and computer-assisted intervention, MICCAI 1999

作者： Chung, Albert C. S. Alison Noble, J. Department of Engineering Science Oxford University OxfordOX1 3PJ United Kingdom

ISBN: (纸本)354066503X

This paper presents an extended version of the fully automated 3D cerebral vessel reconstruction algorithm developed by Wilson and Noble which is applicable to time-of-flight (TOF) and phase contrast (PC) magnetic resonance angiography (MRA) images. We introduce a Rician distribution for background noise modelling and use a modified EM (Expectation-Maximization) algorithm for the parameter estimation procedure. The proposed algorithm is applied to PC-MRA images. It is shown that the estimated Rician distribution gives a better quality-of-fit to the observed background noise distribution than a Gaussian distribution. In the experiments reported, the segmented 3D vasculature is shown to be qualitatively comparable with the results obtained from higher resolution TOF MRA images. © Springer-Verlag Berlin Heidelberg 1999.

关键词： Gaussian distribution

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3D image matching using a finite element based elastic deformation model 2nd

3D image matching using a finite element based elastic defor...

引用

2nd international conference on medical image computing and computer-assisted intervention, MICCAI 1999

作者： Ferrant, Matthieu Warfield, Simon K. Guttmann, Charles R.G. Mulkern, Robert V. Jolesz, Ferenc A. Kikinis, Ron Radiology Brigham and Womens Hospital Harvard Medical School Boston United States Telecommunications Laboratory Université catholique de Louvain Belgium Radiology Children’s Hospital Boston United States

ISBN: (纸本)354066503X

We present a new approach for the computation of the deformation field between three dimensional (3D) images. The deformation field minimizes the sum of the squared differences between the images to be matched and is constrained by the physical properties of the different objects represented by the image. The objects are modeled as elastic bodies. Compared to optical flow methods, this approach distinguishes itself by three main characteristics: it can account for the actual physical properties of the objects to be deformed, it can provide us with physical properties of the deformed objects (i.e. stress tensors), and computes a global solution to the deformation instead of a set of local solutions. This latter characteristic is achieved through a finite-element based scheme. The finite element approach requires the different objects in the images to be meshed. Therefore, a tetrahedral mesh generator using a precomputed case table and specifically suited for segmented images has been developed. Preliminary experiments on simulated data as well as on medical data have been carried out successfully. Tested medical applications included muscle exercise imaging and ventricular deformation in multiple sclerosis. © Springer-Verlag Berlin Heidelberg 1999.

关键词： Physical properties

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Efficient algorithms for lossless compression of 2D/3D images 3rd

Efficient algorithms for lossless compression of 2D/3D image...

引用

3rd international conference on Visual Information Systems, VISUAL 1999

作者： Chen, F. Sahni, Sartaj Vemuri, B.C. CISE Department University of Florida GainesvilleFL32611 United States

ISBN: (纸本)3540660798

We propose enhancements to the 2D lossless image compression method embodied in CALIC. The enhanced version of CALIC obtained better compression than obtained by CALIC on 37 of the 45 images in our benchmark suite. The two methods tied on 6 of the remaining 8 images. This benchmark suite includes medical, natural, and man-made images. We also propose a lossless compression method for 3D images. Our method employs motion estimation and obtained better compression than competing wavelet-based lossless compression methods on all 8 3D medical images in our benchmark suite. © Springer-Verlag Berlin Heidelberg 1999.

关键词： Motion estimation

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