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Reconstitution Tomographique De Proprietes Qualitatives Et Quantitatives Dimages
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Book Synopsis Reconstitution tomographique de propriétés qualitatives et quantitatives d'images by : Fatma Abdmouleh
Download or read book Reconstitution tomographique de propriétés qualitatives et quantitatives d'images written by Fatma Abdmouleh and published by . This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: La tomographie consiste à reconstruire un objet nD à partir de projections (n-1)D. Cette discipline soulève plusieurs questions auxquelles la recherche essaie d'apporter des réponses. On s'intéresse dans cette thèse à trois aspects de cette problématique : 1) la reconstruction de l'image 2D à partir de projections dans un cadre rarement étudié qui est celui des sources ponctuelles ; 2) l'unicité de cette reconstruction ; 3) l'estimation d'informations concernant un objet sans passer par l'étape de reconstitution de son image. Afin d'aborder le problème de reconstruction pour la classe des ensembles convexes, nous définissons une nouvelle classe d'ensembles ayant des propriétés de convexité qu'on appelle convexité par quadrants pour des sources ponctuelles. Après une étude de cette nouvelle classe d'ensembles, nous montrons qu'elle présente des liens forts avec la classe des ensembles convexes. Nous proposons alors un algorithme de reconstruction d'ensemblesconvexes par quadrants qui, si l'unicité de la reconstruction est garantie, permet de reconstruire des ensembles convexes en un temps polynomial. Nous montrons que si une conjecture, que nous avons proposée, est vraie, les conditions de l'unicité pour les ensembles convexes par quadrants sont les mêmes que celles pour les ensembles convexes. Concernant le troisième aspect étudié dans cette thèse, nous proposons une méthode qui permet d'estimer, à partir d'une seule projection, la surface d'un ensemble 2D. Concernant l'estimation du périmètre d'un ensemble 2D, en considérant les projections par une deuxième source d'un ensemble convexe, nous obtenons deux bornes inférieures et une borne supérieure pour le périmètre de l'objet projeté.
Book Synopsis DECOMPOSITION ET RECONSTRUCTION D'IMAGES TOMOGRAPHIQUES PAR LA TRANSFORMEE EN ONDELETTES by : MERYEME.. ZAIM
Download or read book DECOMPOSITION ET RECONSTRUCTION D'IMAGES TOMOGRAPHIQUES PAR LA TRANSFORMEE EN ONDELETTES written by MERYEME.. ZAIM and published by . This book was released on 1995 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt: EN TOMOGRAPHIE, UNE IMAGE EST RECONSTRUITE A PARTIR DE L'ENSEMBLE DE SES PROJECTIONS MONODIMENSIONNELLES SUIVANT DIFFERENTES DIRECTIONS. L'OBJET DE CE TRAVAIL CONCERNE L'ETUDE DES RELATIONS ENTRE ONDELETTES ET TOMOGRAPHIE ET SON APPLICATION AU DEVELOPPEMENT DE METHODES DE DECOMPOSITION ET RECONSTRUCTION MULTIRESOLUTION. NOUS PROPOSONS UNE METHODE DE DECOMPOSITION ET RECONSTRUCTION D'IMAGES TOMOGRAPHIQUES PAR ONDELETTES CONTINUES. NOUS ETUDIONS POUR CELA LES RELATIONS ENTRE LA TRANSFORMEE EN ONDELETTE MONODIMENSIONNELLE DES PROJECTIONS DE L'IMAGE ET LA TRANSFORMEE EN ONDELETTE BIDIMENSIONNELLE DE L'IMAGE ELLE-MEME. NOUS GENERONS POUR CELA UNE ONDELETTE BIDIMENSIONNELLE QUE NOUS UTILISONS POUR OBTENIR UNE DECOMPOSITION EN ONDELETTE DE L'IMAGE TOMOGRAPHIQUE. LES PROPRIETES QUE GENERENT CETTE ANALYSE SONT EGALEMENT ETUDIEES. NOUS ETENDONS CETTE METHODE A UNE REPRESENTATION TEMPS-ECHELLE-DIRECTION EN UTILISANT DES ONDELETTES DIRECTIONNELLES. NOUS PROPOSONS PAR LA SUITE DEUX METHODES DE DECOMPOSITION ET RECONSTRUCTION D'IMAGES TOMOGRAPHIQUES PAR ONDELETTES DISCRETES, UNE METHODE UTILISANT LA DECOMPOSITION MULTIRESOLUTION DYADIQUE ET UNE AUTRE UTILISANT UNE DECOMPOSITION EN QUICONCE. NOUS OBTENONS UNE DECOMPOSITION MULTIRESOLUTION DE L'IMAGE EN UTILISANT UNE DECOMPOSITION MULTIRESOLUTION DES PROJECTIONS DE CETTE IMAGE. POUR LA RECONSTRUCTION, NOUS UTILISONS DES FILTRES BIDIMENSIONNELS NON SEPARABLES. NOUS UTILISONS DEUX APPROCHES EN CE QUI CONCERNE LE CALCUL DES FILTRES. NOUS GENERONS POUR UNE PREMIERE APPROCHE DES FILTRES MONODIMENSIONNELS A PARTIR DE FILTRES BIDIMENSIONNELS ET POUR UNE DEUXIEME APPROCHE DES FILTRES BIDIMENSIONNELS A PARTIR DE FILTRES MONODIMENSIONNELS
Book Synopsis Fundamentals of Computerized Tomography by : Gabor T. Herman
Download or read book Fundamentals of Computerized Tomography written by Gabor T. Herman and published by Springer. This book was released on 2012-03-14 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This revised and updated second edition – now with two new chapters - is the only book to give a comprehensive overview of computer algorithms for image reconstruction. It covers the fundamentals of computerized tomography, including all the computational and mathematical procedures underlying data collection, image reconstruction and image display. Among the new topics covered are: spiral CT, fully 3D positron emission tomography, the linogram mode of backprojection, and state of the art 3D imaging results. It also includes two new chapters on comparative statistical evaluation of the 2D reconstruction algorithms and alternative approaches to image reconstruction.
Book Synopsis Reconstruction tomographique d'images 2D et 3D. by :
Download or read book Reconstruction tomographique d'images 2D et 3D. written by and published by . This book was released on 1996 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Reconstruction en tomographie d'émission à photon unique par les techniques régularisantes de problèmes mal-posés by : Abdelaziz Laouar
Download or read book Reconstruction en tomographie d'émission à photon unique par les techniques régularisantes de problèmes mal-posés written by Abdelaziz Laouar and published by . This book was released on 1996 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt: CETTE THESE PRESENTE UNE ANALYSE DE LA RECONSTRUCTION D'IMAGES TOMOGRAPHIQUES D'EMISSION A PHOTON UNIQUE (SPECT) PAR UNE METHODE EXPERIMENTALE QUI PREND EN COMPTE LES PHENOMENES PHYSIQUES QUI JOUENT UN ROLE TRES IMPORTANT DANS LA DEGRADATION DES IMAGES SPECT. CETTE ANALYSE EST BASEE SUR LES TECHNIQUES DIRECTES DE RECONSTRUCTION. APRES AVOIR POSE LE PROBLEME DE LA RECONSTRUCTION TOMOGRAPHIQUE DE LA DISTRIBUTION RADIOACTIVE D'UN RADIOTRACEUR DANS UN VOLUME, NOUS PASSONS EN REVUE, DANS LA PREMIERE PARTIE, LES DIFFERENTES METHODES DE RECONSTRUCTIONS TOMOGRAPHIQUES, AINSI QUE LES PHENOMENES PHYSIQUES QUI DEGRADENT LES IMAGES SPECT, DONT LES DEUX PRINCIPAUX SONT LA DIFFUSION ET L'ATTENUATION DES PHOTONS. DANS LA SECONDE PARTIE, NOUS PROPOSONS UNE FORMULATION DE LA MODELISATION DE LA FORMATION DE L'IMAGE D'UN OBJET PAR UNE EQUATION INTEGRALE DE FREDHOLM DE PREMIERE ESPECE, DONT LE NOYAU DEPEND DE LA FONCTION DU SYSTEME. DANS LES CONDITIONS REELLES D'ACQUISITION EN MEDECINE NUCLEAIRE, CETTE FORMULATION REPRESENTE UN PROBLEME MAL-POSE. LE NOYAU DE CETTE EQUATION SOUS FORME DISCRETISEE CORRESPOND A CE NOUS AVONS APPELE MATRICE DE TRANSMISSION OU MATRICE SYSTEME. NOUS AVONS PROPOSE UNE METHODE EXPERIMENTALE POUR LA DETERMINATION DE CETTE MATRICE SYSTEME, PAR LE DEPLACEMENT D'UNE SOURCE RADIOACTIVE VOLUMIQUE DANS L'ESPACE OBJET ECHANTILLONNE A ETUDIER. CETTE APPROCHE PERMET DE PRENDRE EN COMPTE LA GLOBALITE DES PARAMETRES PHYSIQUES QUE SONT LA DIFFUSION, L'ATTENUATION ET LA NON UNIFORMITE DE LA REPONSE DU DETECTEUR. POUR LA RECONSTRUCTION DE NOS OBJETS, NOUS PROPOSONS QUATRE TECHNIQUES DE REGULARISATION DES PROBLEMES MAL-POSES: LA TRONCATURE PAR DECOMPOSITION EN VALEURS SINGULIERES (SVDT), LA TECHNIQUE DE TWOMEY-TIKHONOV, CELLE DE LANDWEBER ITERATIVE ET CELLE TWOMEY-TIKHONOV ITERATIVE ; LEURS SOLUTIONS SONT TOUTES EXPRIMEES DANS LA MEME BASE ORTHOGONALE SVD. DANS LA TROISIEME PARTIE, LA THESE EST CONSACREE A L'ANALYSE DES RECONSTRUCTIONS D'OBJETS TEST AVEC LA METHODE SVDT EN FONCTION DE DIFFERENTS PARAMETRES PHYSIQUES, TELS QUE LE NOMBRE D'INCIDENCES, DE FENETRES ENERGETIQUES, DE LIGNES DE LA MATRICE D'ACQUISITION, EN PRESENCE OU ABSENCE DE BRUIT ET DE MILIEU ABSORBANT. NOUS MONTRONS L'INFLUENCE DE CES PARAMETRES SUR LE MAUVAIS CONDITIONNEMENT DU PROBLEME MAL-POSE ET L'EFFET DE LA TRONCATURE PAR SVD SUR SON RECONDITIONNEMENT. ENFIN, UNE COMPARAISON QUALITATIVE ET QUANTITATIVE EST REALISEE ENTRE LES QUATRE TECHNIQUES REGULARISANTES PROPOSEES
Book Synopsis Reconstruction tomographique d'images 2D et 3D by : Françoise Peyrin
Download or read book Reconstruction tomographique d'images 2D et 3D written by Françoise Peyrin and published by . This book was released on 1996 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Industrial Process Gamma Tomography by : International Atomic Energy Agency
Download or read book Industrial Process Gamma Tomography written by International Atomic Energy Agency and published by . This book was released on 2008 with total page 153 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Three-Dimensional Digital Tomosynthesis by : Yulia Levakhina
Download or read book Three-Dimensional Digital Tomosynthesis written by Yulia Levakhina and published by Springer Vieweg. This book was released on 2014-05-06 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: Yulia Levakhina gives an introduction to the major challenges of image reconstruction in Digital Tomosynthesis (DT), particularly to the connection of the reconstruction problem with the incompleteness of the DT dataset. The author discusses the factors which cause the formation of limited angle artifacts and proposes how to account for them in order to improve image quality and axial resolution of modern DT. The addressed methods include a weighted non-linear back projection scheme for algebraic reconstruction and novel dual-axis acquisition geometry. All discussed algorithms and methods are supplemented by detailed illustrations, hints for practical implementation, pseudo-code, simulation results and real patient case examples.
Book Synopsis Medical Applications of Nuclear Physics by : K. Bethge
Download or read book Medical Applications of Nuclear Physics written by K. Bethge and published by Springer Science & Business Media. This book was released on 2013-04-17 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: Methods involving nuclear physics are today finding applications in many disciplines, including important areas of medicine. This book intends to bridge the gap between the many applications in medicine and the underlying basic nuclear physics which needs to be understood by those applying the methods. In addition, those active in nuclear science will gain insight into the manifold applications of their subject. The main topics of the book are: physical foundations, instrumentation, diagnostics (imaging), therapies and radiation safety. The book will appeal to medical doctors active in nuclear medicine as well as to medical physicists.
Book Synopsis The Physics of Radiation Therapy by : Faiz M. Khan
Download or read book The Physics of Radiation Therapy written by Faiz M. Khan and published by Lippincott Williams & Wilkins. This book was released on 2012-03-28 with total page 576 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dr. Khan's classic textbook on radiation oncology physics is now in its thoroughly revised and updated Fourth Edition. It provides the entire radiation therapy team—radiation oncologists, medical physicists, dosimetrists, and radiation therapists—with a thorough understanding of the physics and practical clinical applications of advanced radiation therapy technologies, including 3D-CRT, stereotactic radiotherapy, HDR, IMRT, IGRT, and proton beam therapy. These technologies are discussed along with the physical concepts underlying treatment planning, treatment delivery, and dosimetry. This Fourth Edition includes brand-new chapters on image-guided radiation therapy (IGRT) and proton beam therapy. Other chapters have been revised to incorporate the most recent developments in the field. This edition also features more than 100 full-color illustrations throughout. A companion Website will offer the fully searchable text and an image bank.
Book Synopsis Medical Image Computing and Computer-Assisted Intervention -- MICCAI 2012 by : Nicholas Ayache
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.
Download or read book PET written by Michael E. Phelps and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 650 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is written as both a text and a reference book. It contains numerous images from the biological sciences and clinical practice, tables, graphs, and fig ures, as well as exercises that are worked out to aid the reader in understanding principles or solving problems. In some cases, derivations are placed in appen dices so as not to break up the flow of the subject matter in the text. The book is intended for a broad audience interested in molecular imaging with positron emission tomography (PET). It is expected that the readers will range from undergraduate, graduate, and medical students to residents, physi cians, and scientists with backgrounds from various physical, biological, and medical specialty areas. Each chapter presents material in a straightforward man ner that is well illustrated and explained. Because of the diverse audience for the book, certain chapters or sections of chapters will be of more interest than oth ers to certain segments of the readership. Chapter 1 introduces the fundamental physics upon which PET imaging sys tems is based and discusses in detail the technologies and methods used to pro duce PET images. The chapter starts out by reviewing the physics of positron emission and annihilation and explains how positron range and photon non colinearity in coincidence detection place certain limits on spatial resolution.
Book Synopsis Magnetic Resonance Procedures by : Frank G. Shellock
Download or read book Magnetic Resonance Procedures written by Frank G. Shellock and published by CRC Press. This book was released on 2000-12-21 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt: Magnetic Resonance Procedures: Health Effects and Safety is the first authoritative text on MR procedures and its associated health and safety concerns written by noted radiologists, physicists, and scientists with expertise in the field. It contains both theoretical and practical information. This timely text discusses emergent issues rela
Book Synopsis Targeted Molecular Imaging in Oncology by : E. Edmund Kim
Download or read book Targeted Molecular Imaging in Oncology written by E. Edmund Kim and published by Springer Science & Business Media. This book was released on 2001 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cancer cells dedifferentiate with repect to cell function; their vascularity is more leaky, but perfusion is heterogenerously reduced, and interstitial fluid pressure is high, severely retarding delivery of agents from the blood. Targeted imaging is designed to produce a detectable difference between tissue that is visualized with single photon and positron emission tomography, magnetic resonance imaging, computed tomography, or ultrasonography. This book uniquely reports strategies for the application of molecular targeted imaging agents such as antibodies, peptides, receptors and contrast agents in the biologic grading of tumors, differential diagnosis of tumors, prediction of therapeutic response and monitoring tumor response to treatment. This book also describes updated information about the imaging of tumor angiogenesis, hypoxia, apoptosis and gene delivery as well as expression in the understanding and utility of tumor molecular biology for better cancer management.
Author :Wibke S. Müller-Forell Publisher :Springer Science & Business Media ISBN 13 :354027989X Total Pages :454 pages Book Rating :4.5/5 (42 download)
Book Synopsis Imaging of Orbital and Visual Pathway Pathology by : Wibke S. Müller-Forell
Download or read book Imaging of Orbital and Visual Pathway Pathology written by Wibke S. Müller-Forell and published by Springer Science & Business Media. This book was released on 2005-12-29 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt: Deals with imaging of pathology of the visual system. This book is divided into two parts, general and special. In the general part, important basics of modern imaging methods are discussed. The knowledge on the indication, technique, and results of functional MR imaging is also presented.
Book Synopsis Medical Image Computing and Computer Assisted Intervention – MICCAI 2020 by : Anne L. Martel
Download or read book Medical Image Computing and Computer Assisted Intervention – MICCAI 2020 written by Anne L. Martel and published by Springer Nature. This book was released on 2020-10-02 with total page 867 pages. Available in PDF, EPUB and Kindle. Book excerpt: The seven-volume set LNCS 12261, 12262, 12263, 12264, 12265, 12266, and 12267 constitutes the refereed proceedings of the 23rd International Conference on Medical Image Computing and Computer-Assisted Intervention, MICCAI 2020, held in Lima, Peru, in October 2020. The conference was held virtually due to the COVID-19 pandemic. The 542 revised full papers presented were carefully reviewed and selected from 1809 submissions in a double-blind review process. The papers are organized in the following topical sections: Part I: machine learning methodologies Part II: image reconstruction; prediction and diagnosis; cross-domain methods and reconstruction; domain adaptation; machine learning applications; generative adversarial networks Part III: CAI applications; image registration; instrumentation and surgical phase detection; navigation and visualization; ultrasound imaging; video image analysis Part IV: segmentation; shape models and landmark detection Part V: biological, optical, microscopic imaging; cell segmentation and stain normalization; histopathology image analysis; opthalmology Part VI: angiography and vessel analysis; breast imaging; colonoscopy; dermatology; fetal imaging; heart and lung imaging; musculoskeletal imaging Part VI: brain development and atlases; DWI and tractography; functional brain networks; neuroimaging; positron emission tomography
Book Synopsis X-ray Tomography in Material Science by : José Baruchel
Download or read book X-ray Tomography in Material Science written by José Baruchel and published by Hermes Science Publications. This book was released on 2000 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: How materials behave under different conditions is key information for structural and mechanical engineers. The authors of this book show how X-Ray tomography can be used as a very powerful tool to investigate the microstructure and behavior of structural materials such as A1 and Ti based metal matrix composites, aluminum alloys and foams. The authors describe the technique and introduce the algorithms used for the reconstruction of the 3-D numerical images and illustrate the use of both synchrotron and X-Ray sources.
