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Author: Bernat Palau Tomás
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
[ANGLÈS] This work describes the study of coil for Magnetic Resonance Imaging (MRI) application. Concretely, the principal objective is the design of a birdcage coil (RF coil) to use in a 7 Tesla scanner. More strength field has a better SNR and increased chemical shift effects, improving spectral fat suppression and spectroscopy. Moreover, a better SNR increases the spatial resolution or reduces the imaging time. For this reason, it is interesting research with high fields. The birdcage coil achieves circular polarization and generates a high homogeneous radio frequency magnetic field under many conditions. In this project is designed a Birdcage coil for a 7T to obtain images from small animals (like a mouse). It opens the door to design and construct a Birdcage coil for a 7T to obtain human brain images. In this project thesis, for obtain the design, a study is carried out firstly using the computer program BirdcageBuilder. Secondly, the results obtained with this simulator are introduced to the CST Microwave Studio, creating a 3D model and generating a simulation. In this step, finally the parameters are readjusted to obtain our desired Larmor frequency (298,2MHz) for a correct operation in 7T. These simulations demonstrate the theoretical results from our design and it shows the designed antenna behaviour.
Author: Bernat Palau Tomás
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
[ANGLÈS] This work describes the study of coil for Magnetic Resonance Imaging (MRI) application. Concretely, the principal objective is the design of a birdcage coil (RF coil) to use in a 7 Tesla scanner. More strength field has a better SNR and increased chemical shift effects, improving spectral fat suppression and spectroscopy. Moreover, a better SNR increases the spatial resolution or reduces the imaging time. For this reason, it is interesting research with high fields. The birdcage coil achieves circular polarization and generates a high homogeneous radio frequency magnetic field under many conditions. In this project is designed a Birdcage coil for a 7T to obtain images from small animals (like a mouse). It opens the door to design and construct a Birdcage coil for a 7T to obtain human brain images. In this project thesis, for obtain the design, a study is carried out firstly using the computer program BirdcageBuilder. Secondly, the results obtained with this simulator are introduced to the CST Microwave Studio, creating a 3D model and generating a simulation. In this step, finally the parameters are readjusted to obtain our desired Larmor frequency (298,2MHz) for a correct operation in 7T. These simulations demonstrate the theoretical results from our design and it shows the designed antenna behaviour.
Author: Sergey Makarov
Publisher: Springer Nature
ISBN: 3031154517
Category : Technology & Engineering
Languages : en
Pages : 165
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Book Description
This open access book describes modern applications of computational human modelling to advance neurology, cancer treatment, and radio-frequency studies including regulatory, safety, and wireless communication fields. Readers working on any application that may expose human subjects to electromagnetic radiation will benefit from this book’s coverage of the latest models and techniques available to assess a given technology’s safety and efficacy in a timely and efficient manner. This is an Open Access book.
Author: Sergey Makarov
Publisher: Springer Nature
ISBN: 3030212939
Category : Technology & Engineering
Languages : en
Pages : 398
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Book Description
This open access book describes modern applications of computational human modeling with specific emphasis in the areas of neurology and neuroelectromagnetics, depression and cancer treatments, radio-frequency studies and wireless communications. Special consideration is also given to the use of human modeling to the computational assessment of relevant regulatory and safety requirements. Readers working on applications that may expose human subjects to electromagnetic radiation will benefit from this book’s coverage of the latest developments in computational modelling and human phantom development to assess a given technology’s safety and efficacy in a timely manner. Describes construction and application of computational human models including anatomically detailed and subject specific models; Explains new practices in computational human modeling for neuroelectromagnetics, electromagnetic safety, and exposure evaluations; Includes a survey of modern applications for which computational human models are critical; Describes cellular-level interactions between the human body and electromagnetic fields.
Author: J. Thomas Vaughan
Publisher: John Wiley & Sons
ISBN: 1118590457
Category : Medical
Languages : en
Pages : 34
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Book Description
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
Author:
Publisher:
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Category : Astrophysics
Languages : en
Pages : 28
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Author: Joel Mispelter
Publisher: World Scientific Publishing Company
ISBN: 1783268042
Category : Technology & Engineering
Languages : en
Pages : 754
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Book Description
NMR Probeheads for Biophysical and Biomedical Experiments 2nd Edition is essential reading for anyone in the field of NMR or MRI, from students to medical or biological scientists performing experiments under certain physical and/or geometrical conditions, unattainable by conventional or available probes. The material guides the reader through the most basic and comprehensive stages in accomplishing a correct probe design, from a very basic oscillating circuit to much more elaborate designs.This new edition has been revised and updated to include a chapter dedicated to RF components, which are commonly used for probes realization and their frequency-dependent characteristics. Another completely revised chapter concerns the multiple coil systems and discusses arrays coils, different decoupling methods, and some principles for interfacing coils with low-noise preamplifiers. The principles of linear circuit analysis are presented in a dedicated chapter. Last but not least, accompanying files containing updated software for probe design have been made available from the publisher's website.
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Category : Combat survivability (Military engineering)
Languages : en
Pages : 6
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Author: Ursula van Rienen
Publisher: Springer Science & Business Media
ISBN: 3642568025
Category : Computers
Languages : en
Pages : 387
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treated in more detail. They are just specimen of larger classes of schemes. Es sentially, we have to distinguish between semi-analytical methods, discretiza tion methods, and lumped circuit models. The semi-analytical methods and the discretization methods start directly from Maxwell's equations. Semi-analytical methods are concentrated on the analytical level: They use a computer only to evaluate expressions and to solve resulting linear algebraic problems. The best known semi-analytical methods are the mode matching method, which is described in subsection 2. 1, the method of integral equations, and the method of moments. In the method of integral equations, the given boundary value problem is transformed into an integral equation with the aid of a suitable Greens' function. In the method of moments, which includes the mode matching method as a special case, the solution function is represented by a linear combination of appropriately weighted basis func tions. The treatment of complex geometrical structures is very difficult for these methods or only possible after geometric simplifications: In the method of integral equations, the Greens function has to satisfy the boundary condi tions. In the mode matching method, it must be possible to decompose the domain into subdomains in which the problem can be solved analytically, thus allowing to find the basis functions. Nevertheless, there are some ap plications for which the semi-analytic methods are the best suited solution methods. For example, an application from accelerator physics used the mode matching technique (see subsection 5. 4).
Author: Thomas Goodwin
Publisher: Legare Street Press
ISBN: 9781015602205
Category : Foreign Language Study
Languages : en
Pages : 0
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Book Description
This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Author: Peter L. Conley
Publisher: John Wiley & Sons
ISBN: 9780471121411
Category : Technology & Engineering
Languages : en
Pages : 814
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Book Description
Die Entwicklung von Weltraumfahrzeugen ist ein Industriezweig, der in den vergangenen drei Jahrzehnten beständig gewachsen ist. Heute ist es eine komplexe technische, internationale Branche. Dieses Buch vermittelt Informationen über alle Mechanismen von Weltraumfahrzeugen. Spitzenexperten auf diesem Gebiet, die in verschiedenen Disziplinen zu Hause sind, haben einen wichtigen Beitrag hierzu geleistet. Das Buch ist in drei Teile untergliedert: Grundlagen und technische Eigenschaften wichtiger Materialien; Entwicklung und Verhalten kritischer Komponenten und eine Einführung in Fahrzeugniveau-Analysen und Integrationstechniken. (01/98)
