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Author : Ali Sebbahi
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (493 download)
Download or read book Segmentation 2D et 3D par modeles deformables en imagerie cardio-vasculaire written by Ali Sebbahi and published by . This book was released on 1995 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Ali Sebbahi
Publisher :
ISBN 13 :
Total Pages : 392 pages
Book Rating : 4.:/5 (49 download)
Download or read book Segmentation 2D et 3D par modèles déformables en imagerie cardio-vasculaire written by Ali Sebbahi and published by . This book was released on 1995 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: NOUS PLACONS NOTRE ETUDE DANS LE CADRE DE LA SEGMENTATION 2D ET 3D EN IMAGERIE CARDIO-VASCULAIRE D'UNE STRUCTURE BIEN DEFINIE: UNE CAVITE SANGUINE ENTOUREE PAR UNE PAROI MUSCULAIRE. SI D'UN POINT DE VUE THEORIQUE, LES DEUX MILIEUX, SANG ET PAROI, SONT CONSIDERES COMME QUASI-HOMOGENES, IL EN EST RAREMENT AINSI. TOUTES LES MODALITES D'IMAGERIE (SCANNER X, IRM, IMAGERIE ULTRASONORE) RENCONTRENT CES DEUX PROBLEMES, QUI SONT DIFFEREMMENT CARACTERISES SELON L'AGENT PHYSIQUE EMPLOYE. NOUS ETABLISSONS UN MODELE 3D DE DEFORMATION DE SURFACE POUR RECONSTRUIRE LE VOLUME CARDIAQUE, A PARTIR DE COUPES D'IMAGES 2D, OU ANALYSER DYNAMIQUEMENT LES SEQUENCES D'IMAGES 2D. AFIN DE MIEUX PRENDRE EN COMPTE LES PROBLEMES LIES A L'ESTIMATION DE L'INTERFACE ENTRE LA CAVITE ET LA PAROI, LA SEGMENTATION EST REALISEE A UN NIVEAU LOCAL, REGIONAL ET GLOBAL. CETTE PROCEDURE SE DECOMPOSE EN DEUX PROCESSUS D'EQUILIBRE COMPLEMENTAIRES ET SEQUENTIELS. D'UNE PART, UN PROCESSUS DE DEFORMATION DISCRET DEPLACE UN POINT, INDEPENDAMMENT DES AUTRES POINTS DU MAILLAGE, VERS UN MINIMUM LOCAL DU CHAMP EXTERNE ET, D'AUTRE PART, UN PROCESSUS DE STABILISATION CONTINU, PAR UNE INTERPOLATION SPLINE BICUBIQUE, EVALUE SI LE POINT DEPLACE CORRESPOND A UN MINIMUM REGIONAL DU CHAMP EXTERNE (SEUIL DE DISTANCE DE CHANFREIN). LA CONVERGENCE DU PROCESSUS DE SEGMENTATION EST OBTENUE PAR STABILISATION DE MORCEAUX DE CONTOURS DANS LE CAS 2D ET PAR STABILISATION DE SURFACES ELEMENTAIRES EN 3D. LE COMPROMIS ENTRE LA FORME ET LA NATURE DE L'OBJET DEPEND DES POIDS RELATIFS ENTRE LES DIFFERENTS TERMES D'ENERGIE. CEUX-CI SONT CONTROLES DE MANIERE ADAPTATIVE, PAR UN CRITERE DE CONCAVITE LIE A LA GEOMETRIE DU SYSTEME CARDIO-VASCULAIRE. UNE VALIDATION 2D ET DES RESULTATS 3D SUR DIFFERENTS VOLUMES CARDIO-VASCULAIRES, ONT PERMIS D'OBTENIR DES RESULTATS SATISFAISANTS POUR LESQUELS LA VARIATION DES PARAMETRES EST RELATIVEMENT FAIBLE ET REND PAR CONSEQUENT LE PROCESSUS DE SEGMENTATION ROBUSTE
Author : Dagmar Kainmueller
Publisher : Springer
ISBN 13 : 3658070153
Total Pages : 184 pages
Book Rating : 4.6/5 (58 download)
Download or read book Deformable Meshes for Medical Image Segmentation written by Dagmar Kainmueller and published by Springer. This book was released on 2014-08-18 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: Segmentation of anatomical structures in medical image data is an essential task in clinical practice. Dagmar Kainmueller introduces methods for accurate fully automatic segmentation of anatomical structures in 3D medical image data. The author’s core methodological contribution is a novel deformation model that overcomes limitations of state-of-the-art Deformable Surface approaches, hence allowing for accurate segmentation of tip- and ridge-shaped features of anatomical structures. As for practical contributions, she proposes application-specific segmentation pipelines for a range of anatomical structures, together with thorough evaluations of segmentation accuracy on clinical image data. As compared to related work, these fully automatic pipelines allow for highly accurate segmentation of benchmark image data.
Author : Tian Shen
Publisher :
ISBN 13 : 9781124655307
Total Pages : 149 pages
Book Rating : 4.6/5 (553 download)
Download or read book Model Based Segmentation Methods and Their Application to Biomedical Image Analysis written by Tian Shen and published by . This book was released on 2011 with total page 149 pages. Available in PDF, EPUB and Kindle. Book excerpt: Deformable models have been a classic approach to image segmentation, and they have been used with considerable success, e.g. in segmenting medical images. While traditional deformable models rely on local image gradient information, it is important to incorporate additional contextual constraints, in order to achieve robustness to noise, intensity inhomogeneity, and locally weak boundary. In this thesis, we propose three new deformable model based segmentation methods to extract contour, surface and tubular structures from 2D and 3D medical images. First, 2D and 3D Active Volume Models (AVM) are proposed, which can integrate region information. To further improve the robustness and accuracy of AVM, we propose Multiple-Surface Active Volume Model (MSAVM), which is able to incorporate high-level geometric spatial constraints among multiple objects. Second, to segment 3D objects containing complex surfaces or high curvature regions, we propose a 3D Laplacian-driven parametric deformable model, which preserves model mesh quality by using a novel internal force derived from mesh Laplacian. Third, to segment coronary arteries, we propose 4D parametric deformable curves aiming to extract the vessels' centerlines and corresponding radii simultaneously. We present both qualitative and quantitative validation experiments for all three proposed methods.
Author : Julien Mille
Publisher :
ISBN 13 :
Total Pages : 251 pages
Book Rating : 4.:/5 (115 download)
Download or read book Modèle déformables pour la segmentation et le suivi en imagerie 2D et 3D written by Julien Mille and published by . This book was released on 2007 with total page 251 pages. Available in PDF, EPUB and Kindle. Book excerpt: Les modèles déformables tels que les contours actifs sont des outils généraux et puissants pour la segmentation, en permettant notamment l'adjonction de contraintes et de connaissances a priori sur les objets à segmenter. Un modèle déformable est une structure géométrique déformée à l'aide d'une méthode d'évolution afin de s'ajuster aux frontières des objets recherchés. La segmentation est formulée comme un problèpmme d'optimisation, le but étant de déterminer la courbe ou la surface minimisant une fonction objectif (une énergie) composée de termes internes relatifs à la régularité géométrique du modèle et de termes externes qui mettent en relation le modèlle et l'image. Dans cette thèse, nous développons un modèle de contour actif pour la segmentation 2D et un modèle de surface active pour la segmentation 3D, ces deux modèles étant basés sur un formalisme unifié. Nous généralisons également le modèle de surface au problème de segmentation et suivi 3D+T. Nous proposons un ensemble d'amélioration de l'algorithme glouton, une méthode de minimisation numérique de la fonctionnelle d'énergie. Nous développons un nouveau terme externe basé région, que nous appelons énergie de région en bande étroite. Ce terme combine des caractéristiques locales et globales des structures d'intérêts et présente des avantages tant au niveau calculatoire qu'au niveau de la cohérence par rapport aux données.
Author : Zhenyu Tang
Publisher :
ISBN 13 : 9783183283170
Total Pages : 128 pages
Book Rating : 4.2/5 (831 download)
Download or read book Global and Local Adaption of Geometric Deformable Models for Medical Image Segmentation written by Zhenyu Tang and published by . This book was released on 2011 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Richard Stebbing
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (16 download)
Download or read book Model-based Segmentation Methods for Analysis of 2D and 3D Ultrasound Images and Sequences written by Richard Stebbing and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Walter M. Neuenschwander
Publisher :
ISBN 13 : 9783896490322
Total Pages : 192 pages
Book Rating : 4.4/5 (93 download)
Download or read book Elastic Deformable Contour and Surface Models for 2-D and 3-D Image Segmentation written by Walter M. Neuenschwander and published by . This book was released on 1996 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Eric Bainville
Publisher :
ISBN 13 :
Total Pages : 17 pages
Book Rating : 4.:/5 (446 download)
Download or read book Subvoxel Model-based 3D Segmentation Using Implicit Snakes written by Eric Bainville and published by . This book was released on 1997 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: "Building accurate representations of the surfaces of bones in 3D medical images is an important task in many computer-assisted surgery procedures. We first present a survey of the existing solutions to this problem. Then, we give the results of experiments on new 2D and 3D deformable models. We propose to maximize the correlation of raw image values along contours parallel to the surface of bones. We also propose new representations of deformable contours: an orientation-based representation for 2D contours, and an implicit representation using 4D splines for 3D contours. We finally present some results of subvoxel segmentation of bone surfaces."
Author : Fabrice Vincent
Publisher :
ISBN 13 :
Total Pages : 120 pages
Book Rating : 4.:/5 (491 download)
Download or read book Gabarits déformables élastiques pour la segmentation et le suivi de mouvement du coeur en Imagerie par Résonance Magnétique written by Fabrice Vincent and published by . This book was released on 2001 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nous proposons dans ce mémoire un gabarit déformable dont l'énergie de régulation est issue de la théorie de l'élasticité. Nous appliquons ce gabarit à la segmentation 2D/3D et au suivi du cœur en imagerie cardiaque, notamment en Imagerie par Résonance Magnétique (IRM) standard et de marquage tissulaire. L'objectif médical ainsi poursuivi est la quantification de la fonction contractile du cœur, quantification qui permet d’améliorer la diagnostic de certaines pathologies cardio-vasculaires telles que l'ischémie myocardique. Dans un premier temps, nous décrivons le contexte médical et scientifique de la quantification de la fonction contractile du cœur en traitement d’images. Nous proposons ensuite une synthèse sur une classe de méthodes de segmentation, « les gabarits déformables », qui permet d'introduire des connaissances a priori dans le processus de segmentation. Nous étudions alors un gabarit déformable original dont l’énergie interne est constituée par l’énergie élastique d’un matériau isotrope linéaire. Nous effectuons tout d’abord un rappel des notions élémentaires de la théorie de l'élasticité et de la Méthode des Éléments Finis qui permet la résolution numérique des problèmes d'élasticité. Nous exposons ensuite les principes théoriques d'un gabarit déformable reposant dur l'énergie élastique. Nous proposons également une amélioration de celui-ci par l'ajout d'un terme régularisant les interfaces du gabarit. Nous exposons enfin des résultats de l'application de notre gabarit à la segmentation et au suivi du cœur en IRM standard d'une part, et en IRM de marquage tissulaire, d'autre part.
Author : Daniel Ruckert
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (594 download)
Download or read book Segmentation and Tracking in Cardiovascular Images Using Geometrically Deformable Models and Templates written by Daniel Ruckert and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Nicholas Ayache
Publisher : Springer
ISBN 13 : 9783642334535
Total Pages : 645 pages
Book Rating : 4.3/5 (345 download)
Download or read book Medical Image Computing and Computer-Assisted Intervention -- MICCAI 2012 written by Nicholas Ayache and published by Springer. This book was released on 2012-08-28 with total page 645 pages. Available in PDF, EPUB and Kindle. Book excerpt: The three-volume set LNCS 7510, 7511, and 7512 constitutes the refereed proceedings of the 15th International Conference on Medical Image Computing and Computer-Assisted Intervention, MICCAI 2012, held in Nice, France, in October 2012. Based on rigorous peer reviews, the program committee carefully selected 252 revised papers from 781 submissions for presentation in three volumes. The third volume includes 79 papers organized in topical sections on diffusion imaging: from acquisition to tractography; image acquisition, segmentation and recognition; image registration; neuroimage analysis; analysis of microscopic and optical images; image segmentation; diffusion weighted imaging; computer-aided diagnosis and planning; and microscopic image analysis.
Author : Chris Guy
Publisher :
ISBN 13 : 9781860945021
Total Pages : 374 pages
Book Rating : 4.9/5 (45 download)
Download or read book An Introduction to the Principles of Medical Imaging written by Chris Guy and published by . This book was released on 2005 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt: - Covers the entire field of medical imaging at an introductory level - Provides a brief description of the clinical context of imaging for students with an engineering background - Provides a descriptive, non-mathematical background to the physics underpinning imaging for students with a medical background - Includes exercises and problems at the end of every chapter to test readers' understanding of the material
Author : Nicholas Ayache
Publisher : Springer
ISBN 13 : 354049197X
Total Pages : 564 pages
Book Rating : 4.5/5 (44 download)
Download or read book Computer Vision, Virtual Reality and Robotics in Medicine written by Nicholas Ayache and published by Springer. This book was released on 2006-04-10 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains the written contributions to the program of the First In ternational Conference on Computer Vision, Virtual Reality, and Robotics in Medicine (CVRMed'95) held in Nice during the period April 3-6, 1995. The articles are regrouped into a number of thematic sessions which cover the three major topics of the field: medical image understanding, registration problems in medicine, and therapy planning, simulation and control. The objective of the conference is not only to present the most innovative and promising research work but also to highlight research trends and to foster dialogues and debates among participants. This event was decided after a preliminary successful symposium organized in Stanford in March 1994 by E. Grimson (MIT), T. Kanade (CMU), R. Kikinis and W. Wells (Chair) (both at Harvard Medical School and Brigham and Women's Hospital), and myself (INRIA). We received 92 submitted full papers, and each one was evaluated by at least three members of the Program Committee, with the help of auxiliary reviewers. Based on these evaluations, a representative subset of the Program Committee met to select 19 long papers, 29 regular papers, and 27 posters. The geographical repartition of the contributions is the following: 24 from European countries (other than France), 23 contributions from France, 20 from Northern America (USA and Canada), and 8 from Asia (Japan and Singapore).
Author : James Duncan
Publisher : Springer
ISBN 13 : 3540320946
Total Pages : 981 pages
Book Rating : 4.5/5 (43 download)
Download or read book Medical Image Computing and Computer-Assisted Intervention – MICCAI 2005 written by James Duncan and published by Springer. This book was released on 2005-09-27 with total page 981 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Marc Thiriet
Publisher : Springer Science & Business Media
ISBN 13 : 0387748490
Total Pages : 468 pages
Book Rating : 4.3/5 (877 download)
Download or read book Biology and Mechanics of Blood Flows written by Marc Thiriet and published by Springer Science & Business Media. This book was released on 2007-12-20 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt: This authoritative book presents the basic knowledge and state-of-the-art techniques necessary to carry out investigations of the cardiovascular system using modeling and simulation. This volume contains chapters on anatomy, physiology, continuum mechanics, as well as pathological changes in the vasculature walls including the heart and their treatments. Methods of numerical simulations are given and illustrated in particular by application to wall diseases.
Author : Ulrich Sigwart
Publisher : Thieme-Stratton Corporation
ISBN 13 : 9780865771468
Total Pages : 327 pages
Book Rating : 4.7/5 (714 download)
Download or read book Ventricular Wall Motion written by Ulrich Sigwart and published by Thieme-Stratton Corporation. This book was released on 1984 with total page 327 pages. Available in PDF, EPUB and Kindle. Book excerpt:
