Antennes Radiofr Quence Pour L Irm Th Orie Et Application
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Antennes Radiofr Quence Pour L Irm Th Orie Et Application
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Author : Sidi Mohamed Ahmed Ghaly
language : fr
Publisher: Editions Universitaires Europeennes
Release Date : 2015-03-06
Antennes Radiofr Quence Pour L Irm Th Orie Et Application written by Sidi Mohamed Ahmed Ghaly and has been published by Editions Universitaires Europeennes this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-03-06 with categories.
Ce livre est consacre a l'etude de sondes radiofrequence destinees a l'imagerie par resonance magnetique, presentant une certaine simplicite de mise en uvre et ayant des performances interessantes en termes d'homogeneite de champ magnetique B1. Le premier chapitre donne une description generale sur les principes de la RMN et de l'IRM. Ces aspects sont suivis d'une description des caracteristiques indispensables a la technique de construction des antennes RMN (facteur de qualite, S/B, etc.). Sont ensuite decrites plusieurs structures d'antennes de base utilisees en RMN, en particulier les bobines de Helmholtz. Le second et le troisieme chapitre sont consacres aux differentes structures d'antennes qui ont ete developpees. Ainsi, l'etude et la realisation d'antennes symetriques a quatre spires circulaires coaxiales sur une surface spherique et ellipsoidale sont presentees. La modelisation electrique complete de l'antenne prenant en compte tous les couplages magnetiques entre spires est presentee. Les resultats d'essais comparatifs, en espace libre et (en champ) dans un spectro-imageur, entre une antenne de Helmholtz (de reference) et nos antennes sont presentes.
D Veloppement D Antennes Supraconductrices Bas Es Sur Les R Seaux De Squid Pour La R Sonance Magn Tique Nucl Aire Champ Faible
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Author : Aimé Labbe
language : fr
Publisher:
Release Date : 2019
D Veloppement D Antennes Supraconductrices Bas Es Sur Les R Seaux De Squid Pour La R Sonance Magn Tique Nucl Aire Champ Faible written by Aimé Labbe and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019 with categories.
L'imagerie par résonance magnétique (IRM) est une modalité qui offre de bons contrastes et une bonne résolution spatiale, mais qui souffre d'un important problème de sensibilité. Pour répondre à cette problématique, le paradigme actuel est d'accroitre le champ magnétique des aimants d'IRM. Ceci mène toutefois à une explosion des coûts et à des contraintes accrues vis-à-vis des patients. L'approche que nous présentons est radicalement différente~: il s'agit de travailler à champ faible. Les antennes classiques n'étant pas assez sensibles pour recueillir le signal, l'idée est d'utiliser des SQIF. Ces derniers sont une nouvelle technologie d'antennes supraconductrices ultra-sensibles basées sur les réseaux de SQUID. Le projet vise à optimiser les capteurs SQIF et à les adapter pour la première fois à la RMN afin de mesurer un signal sur un aimant à 0.2~T.Pour ce faire, nous avons développé et étudié les performances de nouvelles architectures d'antennes SQIF afin de définir la géométrie la plus adaptée à la RMN. Nous avons également cherché à mieux comprendre comment le contexte d'utilisation de ces nouvelles antennes pouvait influencer leurs performances. Le jeu d'antennes le plus performant réalisé avait un facteur de transfert de 8.4~kVperT et un seuil de détection de 190~fTperHz. Il fut également observé que la présence d'un champ magnétique pendant le refroidissement de ces capteurs supraconducteurs dégradait leur réponse, phénomène à prendre en compte en RMN.Un Démonstrateur Super-QIF intégrant un SQIF dans l'IRM à 0.2~T fut conçu en tenant compte des contraintes géométriques et de l'environnement magnétique. Après sa fabrication, la température du cryostat était de 50~K, donc suffisante pour le bon fonctionnement des SQIF. Les premiers tests ont montrés que la présence du système ne perturbait pas le signal de RMN.Le démonstrateur est toujours en cours de développement et devrait permettre de mesurer un de RMN dans les mois à venir. À long terme, ces travaux pavent la voie à des applications des SQIF en IRM à champ terrestre.
La Couleur Des Aliments
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Author : Muriel Jacquot
language : fr
Publisher: Lavoisier
Release Date : 2011
La Couleur Des Aliments written by Muriel Jacquot and has been published by Lavoisier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with Color of food categories.
Ultra High Field Magnetic Resonance Imaging
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Author : Pierre-Marie Robitaille
language : en
Publisher: Springer Science & Business Media
Release Date : 2007-12-31
Ultra High Field Magnetic Resonance Imaging written by Pierre-Marie Robitaille and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007-12-31 with Medical categories.
The foundation for understanding the function and dynamics of biological systems is not only knowledge of their structure, but the new methodologies and applications used to determine that structure. This volume in Biological Magnetic Resonance emphasizes the methods that involve Ultra High Field Magnetic Resonance Imaging. It will interest researchers working in the field of imaging.
Mri Of Cardiovascular Malformations
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Author : Bruno Kastler
language : en
Publisher: Springer Science & Business Media
Release Date : 2010-11-04
Mri Of Cardiovascular Malformations written by Bruno Kastler and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010-11-04 with Medical categories.
MRI is a non-invasive and non-ionizing imaging modality that is perfectly suited for the diagnosis and follow-up of both pediatric and adult congenital heart disease. It provides a large field of view and has the unique ability to depict complex cardiac and vascular anatomy and to measure cardiac function and flow within one examination. MRI is the ideal complement to echocardiography whenever the information provided by the latter is limited. This book has been conceived as a self-teaching manual that will assist qualified radiologists, cardiologists, and pediatricians, as well as those in training. It is richly illustrated with numerous images and drawings that cover all usual and most unusual anomalies. The principal author, Professor Bruno Kastler, is head of radiology at Besançon University Hospital, France and is board certified in both radiology and cardiology.
Physics From Fisher Information
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Author : B. Roy Frieden
language : en
Publisher: Cambridge University Press
Release Date : 1998-12-10
Physics From Fisher Information written by B. Roy Frieden and has been published by Cambridge University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998-12-10 with Computers categories.
A unified derivation of physics from Fisher information, giving new insights into physical phenomena.
Rf Coils For Mri
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Author : J. Thomas Vaughan
language : en
Publisher: John Wiley & Sons
Release Date : 2012-11-28
Rf Coils For Mri written by J. Thomas Vaughan and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-11-28 with Medical categories.
The content of this volume has been added to eMagRes (formerly Encyclopedia of Magnetic Resonance) - the ultimate online resource for NMR and MRI. To date there is no single reference aimed at teaching the art of applications guided coil design for use in MRI. This RF Coils for MRI handbook is intended to become this reference. Heretofore, much of the know-how of RF coil design is bottled up in various industry and academic laboratories around the world. Some of this information on coil technologies and applications techniques has been disseminated through the literature, while more of this knowledge has been withheld for competitive or proprietary advantage. Of the published works, the record of technology development is often incomplete and misleading, accurate referencing and attribution assignment being tantamount to admission of patent infringement in the commercial arena. Accordingly, the literature on RF coil design is fragmented and confusing. There are no texts and few courses offered to teach this material. Mastery of the art and science of RF coil design is perhaps best achieved through the learning that comes with a long career in the field at multiple places of employment…until now. RF Coils for MRI combines the lifetime understanding and expertise of many of the senior designers in the field into a single, practical training manual. It informs the engineer on part numbers and sources of component materials, equipment, engineering services and consulting to enable anyone with electronics bench experience to build, test and interface a coil. The handbook teaches the MR system user how to safely and successfully implement the coil for its intended application. The comprehensive articles also include information required by the scientist or physician to predict respective experiment or clinical performance of a coil for a variety of common applications. It is expected that RF Coils for MRI becomes an important resource for engineers, technicians, scientists, and physicians wanting to safely and successfully buy or build and use MR coils in the clinic or laboratory. Similarly, this guidebook provides teaching material for students, fellows and residents wanting to better understand the theory and operation of RF coils. Many of the articles have been written by the pioneers and developers of coils, arrays and probes, so this is all first hand information! The handbook serves as an expository guide for hands-on radiologists, radiographers, physicians, engineers, medical physicists, technologists, and for anyone with interests in building or selecting and using RF coils to achieve best clinical or experimental results. About EMR Handbooks / eMagRes Handbooks The Encyclopedia of Magnetic Resonance (up to 2012) and eMagRes (from 2013 onward) publish a wide range of online articles on all aspects of magnetic resonance in physics, chemistry, biology and medicine. The existence of this large number of articles, written by experts in various fields, is enabling the publication of a series of EMR Handbooks / eMagRes Handbooks on specific areas of NMR and MRI. The chapters of each of these handbooks will comprise a carefully chosen selection of articles from eMagRes. In consultation with the eMagRes Editorial Board, the EMR Handbooks / eMagRes Handbooks are coherently planned in advance by specially-selected Editors, and new articles are written (together with updates of some already existing articles) to give appropriate complete coverage. The handbooks are intended to be of value and interest to research students, postdoctoral fellows and other researchers learning about the scientific area in question and undertaking relevant experiments, whether in academia or industry. Have the content of this Handbook and the complete content of eMagRes at your fingertips! Visit: www.wileyonlinelibrary.com/ref/eMagRes View other eMagRes publications here
Neuro Imagerie Diagnostique
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Author : Jean-Louis Dietemann
language : fr
Publisher: Elsevier Health Sciences
Release Date : 2018-06-26
Neuro Imagerie Diagnostique written by Jean-Louis Dietemann and has been published by Elsevier Health Sciences this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-06-26 with Medical categories.
Le scanner et l’IRM ont complètement révolutionné l’étude morphologique et fonctionnelle du système nerveux, modifiant également l’approche thérapeutique des pathologies cranio-encéphaliques et contribuant aux progrès de la neurochirurgie. Ces techniques, conjuguées aux dernières innovations (imagerie par tenseur de diffusion, tractographie, imagerie fonctionnelle, spectroscopie, angio-IRM dynamique, scanner multibarrette, etc.), mettent à la disposition du radiologue des outils performants, à condition de maîtriser à la fois techniques, données cliniques et pathologies à rechercher. Ce traité a ainsi pour objectif d’établir une synthèse des connaissances de la neuroradiologie diagnostique. Radiologues et cliniciens sont invités à évaluer les apports de l’imagerie neuroradiologique appliquée successivement aux accidents vasculaires cérébraux, aux lésions tumorales, aux dysfonctionnements de la région sellaire et aux autres pathologies cérébrales de nature infectieuse, dégénérative ou congénitale. D’autre part, l’ouvrage éclaire le praticien sur les erreurs diagnostiques, oriente ses interprétations et l’aide à déterminer la technique d’imagerie la plus performante en fonction de la pathologie étudiée. Le succès des deux premières éditions et les avancées permanentes dans ce domaine imposaient une nouvelle édition de ce traité. Fruit d’une collaboration étroite entre spécialistes de renom, riche de plus de 3 500 iconographies, dont plus de 500 nouveaux clichés présentant les dernières techniques (angio-IRM, pet-scan, imagerie de perfusion, imagerie fonctionnelle, spectroscopie, etc.) et de références entièrement à jour des derniers travaux, ce traité constitue la référence française en neuro-imagerie. Il est indispensable pour tous les radiologues et neuroradiologues. Parallèlement, les neurologues et neurochirurgiens y trouveront les clés nécessaires au dialogue pluridisciplinaire. Banque d’images en ligne : l’ensemble des iconographies y sont regroupées et accessibles facilement via un moteur de recherche. Retrouvez également d’autres fonctionnalités. Pour y accéder, connectez-vous sur www.em-consulte.com/e-complement/4753944 et suivez les instructions pour activer votre accès. Jean-Louis Dietemann, professeur honoraire de l’Université de Strasbourg, ancien chef du service de Neuroradiologie, à l’hôpital de Hautepierre — Hôpitaux universitaires de Strasbourg, a coordonné cet ouvrage.
Medical Imaging Based On Magnetic Fields And Ultrasounds
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Author : Hervé Fanet
language : en
Publisher: John Wiley & Sons
Release Date : 2014-03-06
Medical Imaging Based On Magnetic Fields And Ultrasounds written by Hervé Fanet and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-03-06 with Science categories.
This book describes the different principles and equipment used in medical imaging. The importance of medical imaging for diagnostics is rapidly increasing. A good working knowledge of all the different possible physical principles involved in medical imaging is now imperative. This book covers many of these principles including matter photon interactions, the principles of detectors, detectors and information processing for radiology, X-ray tomography, positron tomography, single photon tomography and optical tomography.
Musculoskeletal Mri E Book
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Author : Nancy M. Major
language : en
Publisher: Elsevier Health Sciences
Release Date : 2019-10-04
Musculoskeletal Mri E Book written by Nancy M. Major and has been published by Elsevier Health Sciences this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-10-04 with Medical categories.
Ideal for residents, practicing radiologists, and fellows alike, this updated reference offers easy-to-understand guidance on how to approach musculoskeletal MRI and recognize abnormalities. Concise, to-the-point text covers MRI for the entire musculoskeletal system, presented in a highly templated format. Thoroughly revised and enhanced with full-color artwork throughout, this resource provides just the information you need to perform and interpret quality musculoskeletal MRI. Includes the latest protocols, practical advice, tips, and pearls for diagnosing conditions impacting the temporomandibular joint, shoulder, elbow, wrist/hand, spine, hips and pelvis, knee, and foot and ankle. Follows a quick-reference format throughout, beginning with basic technical information on how to obtain a quality examination, followed by a discussion of the normal appearance and the abnormal appearance for each small unit that composes a joint. Depicts both normal and abnormal anatomy, as well as disease progression, through more than 600 detailed, high-quality images, most of which are new to this edition. Features key information boxes throughout for a quick review of pertinent material.