Magnetic Resonance Imaging

Magnetic Resonance Imaging

Author: Christakis Constantinides

Publisher: CRC Press

ISBN: 9781482217315

Category: Medical

Page: 240

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Magnetic resonance imaging (MRI) is a rapidly developing field in basic applied science and clinical practice. Research efforts in this area have already been recognized with five Nobel prizes awarded to seven Nobel laureates in the past 70 years. Based on courses taught at The Johns Hopkins University, Magnetic Resonance Imaging: The Basics provides a solid introduction to this powerful technology. The book begins with a general description of the phenomenon of magnetic resonance and a brief summary of Fourier transformations in two dimensions. It examines the fundamental principles of physics for nuclear magnetic resonance (NMR) signal formation and image construction and provides a detailed explanation of the mathematical formulation of MRI. Numerous image quantitative indices are discussed, including (among others) signal, noise, signal-to-noise, contrast, and resolution. The second part of the book examines the hardware and electronics of an MRI scanner and the typical measurements and simulations of magnetic fields. It introduces NMR spectroscopy and spectral acquisition and imaging techniques employing various pulse sequences. The final section explores the advanced imaging technique of parallel imaging. Structured so that each chapter builds on the knowledge gained in the previous one, the book is enriched by numerous worked examples and problem sets with selected solutions, giving readers a firm grasp of the foundations of MRI technology.

Magnetic Resonance Imaging

Magnetic Resonance Imaging

Author: Robert W. Brown

Publisher: John Wiley & Sons

ISBN: 9780471720850

Category: Medical

Page: 976

View: 848

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New edition explores contemporary MRI principles and practices Thoroughly revised, updated and expanded, the second edition of Magnetic Resonance Imaging: Physical Principles and Sequence Design remains the preeminent text in its field. Using consistent nomenclature and mathematical notations throughout all the chapters, this new edition carefully explains the physical principles of magnetic resonance imaging design and implementation. In addition, detailed figures and MR images enable readers to better grasp core concepts, methods, and applications. Magnetic Resonance Imaging, Second Edition begins with an introduction to fundamental principles, with coverage of magnetization, relaxation, quantum mechanics, signal detection and acquisition, Fourier imaging, image reconstruction, contrast, signal, and noise. The second part of the text explores MRI methods and applications, including fast imaging, water-fat separation, steady state gradient echo imaging, echo planar imaging, diffusion-weighted imaging, and induced magnetism. Lastly, the text discusses important hardware issues and parallel imaging. Readers familiar with the first edition will find much new material, including: New chapter dedicated to parallel imaging New sections examining off-resonance excitation principles, contrast optimization in fast steady-state incoherent imaging, and efficient lower-dimension analogues for discrete Fourier transforms in echo planar imaging applications Enhanced sections pertaining to Fourier transforms, filter effects on image resolution, and Bloch equation solutions when both rf pulse and slice select gradient fields are present Valuable improvements throughout with respect to equations, formulas, and text New and updated problems to test further the readers' grasp of core concepts Three appendices at the end of the text offer review material for basic electromagnetism and statistics as well as a list of acquisition parameters for the images in the book. Acclaimed by both students and instructors, the second edition of Magnetic Resonance Imaging offers the most comprehensive and approachable introduction to the physics and the applications of magnetic resonance imaging.

Magnetic Resonance Imaging Handbook

Magnetic Resonance Imaging Handbook

Author: Luca Saba

Publisher: CRC Press

ISBN: 1482216280

Category: Medical

Page: 2000

View: 729

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Magnetic resonance imaging (MRI) is an imaging technique used in biomedical imaging and radiology to visualize detailed internal structures of the body. The purpose of this book is to cover engineering and clinical benefits in diagnosing human pathologies using MRI. It will cover the protocols and potentialities of advanced MRI scanners in addition to explaining the physical principles of MRI and how to use this technique correctly. Each organ’s anatomy and pathological processes are highlighted with high-quality images.

Magnetic Resonance Imaging

Magnetic Resonance Imaging

Author: Marinus T. Vlaardingerbroek

Publisher: Springer Science & Business Media

ISBN: 3540436812

Category: Mathematics

Page: 526

View: 424

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Presents an overall analytical treatment of MRI physics and engineering. Special attention is paid to the treatment of intrinsic artefacts of the different sequences which can be described for the different scan methods. The book contains many images, especially showing specific properties of the different scan methods. The methods discussed include RARE, GRASE, EPI and Spiral Scan. The 3rd edition deals with stranger gradient and new RF coil systems, and sequences such as Balanced FFE and q-space diffusion imaging and SENSE.

Basics of Magnetic Resonance Imaging

Basics of Magnetic Resonance Imaging

Author: William Oldendorf

Publisher: Springer Science & Business Media

ISBN: 089838964X

Category: Medical

Page: 446

View: 423

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This book is not intended as a general text on MRI. It is written as an intro duction to the field, for nonexperts. We present here a simple exposition of certain aspects of MRI that are important to understand to use this valuable diagnostic tool intelligently in a clinical setting. The basic principles are presented nonmathematically, using no equations and a minimum of symbols and abbreviations. For those requiring a deeper understanding of MRI, this book will help facilitate the transition to standard texts. Chapters 1 through 4 provide a general introduction to the phenomenon of nuclear magnetic resonance and how it is used in imaging. Chapter 1 discus ses magnetic resonance, using a compass needle as an example. In Chapter 2, the transition to the magnetic resonance of the atomic nucleus is made. Chapter 3 describes the principles of imaging. In Chapter 4, the terms T 1 and T 2 are described and their relationship to tissue characterization; the fun damental role of thermal magnetic noise in T 1 and T 2 is discussed.

Fluorine Magnetic Resonance Imaging

Fluorine Magnetic Resonance Imaging

Author: Ulrich Flogel

Publisher: CRC Press

ISBN: 9781315340937

Category: Medical

Page: 462

View: 861

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Over the past decade, fluorine (19F) magnetic resonance imaging (MRI) has garnered significant scientific interest in the biomedical research community owing to the unique properties of fluorinated materials and the 19F nucleus. Fluorine has an intrinsically sensitive nucleus for MRI. There is negligible endogenous 19F in the body and thus there is no background signal. Fluorine-containing compounds are ideal tracer labels for a wide variety of MRI applications. Moreover, the chemical shift and nuclear relaxation rate can be made responsive to physiology via creative molecular design. This book is an interdisciplinary compendium that details cutting-edge science and medical research in the emerging field of 19F MRI. Edited by Ulrich Flögel and Eric Ahrens, two prominent MRI researchers, this book will appeal to investigators involved in MRI, biomedicine, immunology, pharmacology, probe chemistry, and imaging physics.

Understanding Magnetic Resonance Imaging

Understanding Magnetic Resonance Imaging

Author: Robert C. Smith

Publisher: CRC Press

ISBN: 0849326583

Category: Medical

Page: 242

View: 516

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Magnetic resonance imaging (MRI) is the most technically dependent imaging technique in radiology. To perform and interpret MRI studies correctly, an understanding of the basic underlying principles is essential. Understanding Magnetic Resonance Imaging explains the pulse sequences, imaging options, and coils used to produce MR images, providing a strong foundation for performing and interpreting imaging studies. The text is complemented by more than 100 figures and 25 photomicrographs illustrating the techniques discussed. Radiology residents, MR technologists, and radiologists should not be without Understanding Magnetic Resonance Imaging-the only single resource that explains all technical aspects of MRI, including recent advances, and presents all imaging options.

Electromagnetic Analysis and Design in Magnetic Resonance Imaging

Electromagnetic Analysis and Design in Magnetic Resonance Imaging

Author: Jianming Jin

Publisher: Routledge

ISBN: 9781351453400

Category: Medical

Page: 304

View: 926

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This book presents a comprehensive treatment of electromagnetic analysis and design of three critical devices for an MRI system - the magnet, gradient coils, and radiofrequency (RF) coils. Electromagnetic Analysis and Design in Magnetic Resonance Imaging is unique in its detailed examination of the analysis and design of the hardware for an MRI system. It takes an engineering perspective to serve the many scientists and engineers in this rapidly expanding field. Chapters present: an introduction to MRI basic concepts of electromagnetics, including Helmholtz and Maxwell coils, inductance calculation, and magnetic fields produced by special cylindrical and spherical surface currents principles for the analysis and design of gradient coils, including discrete wires and the target field method analysis of RF coils based on the equivalent lumped-circuit model as well as an analysis based on the integral equation formulation survey of special purpose RF coils analytical and numerical methods for the analysis of electromagnetic fields in biological objects With the continued, active development of MRI instrumentation, Electromagnetic Analysis and Design in Magnetic Resonance Imaging presents an excellent, logically organized text - an indispensable resource for engineers, physicists, and graduate students working in the field of MRI.

Magnetic Resonance Imaging

Magnetic Resonance Imaging

Author: Robert Sigal

Publisher: Springer

ISBN: 3642730396

Category: Medical

Page: 102

View: 702

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Magnetic Resonance Imaging (MRI) is a rapidly evolving technique which is having a significant impact on medical imaging. Only a few years ago, al though Nuclear Magnetic Resonance (NMR) was well known as an important analytical technique in the field of chemical analysis, it was effectively un known in medical circles. Following the initial work of PAUL LAUTERBUR and RAYMOND DAMADIAN in the early 1970s demonstrating that it was possible to use NMR to produce im ages, progress in the medical fields was relatively slow. Recently, however, with the availability of commercial systems, progress has been very rapid, with increasing acceptance of MRI as a basic imaging technique, and the develop ment of exciting new applications. MRI is a relatively complex technique. First, the image depends on many more intrinsic and extrinsic parameters than it does of in techniques like X-ra diography and computed tomography, and secondly, the intrinsic parameters such as T1 and T2 are conceptually complex, involving ideas not usually de scribed in traditional medical imaging courses. In order to produce good MR images efficiently, and to obtain the maximum information from them, it is necessary to appreciate, if not to fully understand, these parameters. Further more, knowledge of how the image is produced helps in appreciating the ori gin of the artifacts sometimes found in MRI due to effects like patient motion and fluid flow.

Magnetic Resonance Imaging in Ischemic Stroke

Magnetic Resonance Imaging in Ischemic Stroke

Author: Rüdiger von Kummer

Publisher: Springer Science & Business Media

ISBN: 9783540277385

Category: Medical

Page: 308

View: 307

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Provides a comprehensive summary of the current role of MR imaging in patients with ischemic stroke. Specifically designed to meet the needs of both clinicians and radiologists. Documents the MR correlates of specific stroke syndromes. Contains many high-quality illustrations.