High Speed Mri
DOWNLOAD
Download High Speed Mri PDF/ePub or read online books in Mobi eBooks. Click Download or Read Online button to get High Speed Mri book now. This website allows unlimited access to, at the time of writing, more than 1.5 million titles, including hundreds of thousands of titles in various foreign languages. If the content not found or just blank you must refresh this page
High Speed Mri
DOWNLOAD
Author : Claudia A. Wheeler-Kingshott
language : en
Publisher:
Release Date : 1998
High Speed Mri written by Claudia A. Wheeler-Kingshott and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with categories.
Fast Quantitative Magnetic Resonance Imaging
DOWNLOAD
Author : Guido Buonincontri
language : en
Publisher: Springer Nature
Release Date : 2022-05-31
Fast Quantitative Magnetic Resonance Imaging written by Guido Buonincontri and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-05-31 with Technology & Engineering categories.
Among medical imaging modalities, magnetic resonance imaging (MRI) stands out for its excellent soft-tissue contrast, anatomical detail, and high sensitivity for disease detection. However, as proven by the continuous and vast effort to develop new MRI techniques, limitations and open challenges remain. The primary source of contrast in MRI images are the various relaxation parameters associated with the nuclear magnetic resonance (NMR) phenomena upon which MRI is based. Although it is possible to quantify these relaxation parameters (qMRI) they are rarely used in the clinic, and radiological interpretation of images is primarily based upon images that are relaxation time weighted. The clinical adoption of qMRI is mainly limited by the long acquisition times required to quantify each relaxation parameter as well as questions around their accuracy and reliability. More specifically, the main limitations of qMRI methods have been the difficulty in dealing with the high inter-parameter correlations and a high sensitivity to MRI system imperfections. Recently, new methods for rapid qMRI have been proposed. The multi-parametric models at the heart of these techniques have the main advantage of accounting for the correlations between the parameters of interest as well as system imperfections. This holistic view on the MR signal makes it possible to regress many individual parameters at once, potentially with a higher accuracy. Novel, accurate techniques promise a fast estimation of relevant MRI quantities, including but not limited to longitudinal (T1) and transverse (T2) relaxation times. Among these emerging methods, MR Fingerprinting (MRF), synthetic MR (syMRI or MAGIC), and T1‒T2 Shuffling are making their way into the clinical world at a very fast pace. However, the main underlying assumptions and algorithms used are sometimes different from those found in the conventional MRI literature, and can be elusive at times. In this book, we take the opportunity to study and describe the main assumptions, theoretical background, and methods that are the basis of these emerging techniques. Quantitative transient state imaging provides an incredible, transformative opportunity for MRI. There is huge potential to further extend the physics, in conjunction with the underlying physiology, toward a better theoretical description of the underlying models, their application, and evaluation to improve the assessment of disease and treatment efficacy.
Development Of High Speed High Resolution Magnetic Resonance Imaging And Tagging Techniques
DOWNLOAD
Author : Scott B. Reeder
language : en
Publisher:
Release Date : 1993
Development Of High Speed High Resolution Magnetic Resonance Imaging And Tagging Techniques written by Scott B. Reeder and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with categories.
Handbook Of Mri Technique
DOWNLOAD
Author : Catherine Westbrook
language : en
Publisher: John Wiley & Sons
Release Date : 2013-03-13
Handbook Of Mri Technique written by Catherine Westbrook 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 2013-03-13 with Medical categories.
The progress of magnetic resonance imaging (MRI) as a clinical tool has been extraordinary, out-stripping the rate of development of any other imaging technique. There has been a huge increase in the practical applications of MRI techniques and its uses look likely to extend even further with the development of high speed gradients and pulse sequences. The Handbook of MRI Technique has proved highly successful in guiding the uninitiated through scanning techniques and helping more experienced technologists to improve image quality. The third edition of this highly successful book has been fully revised and updated to consider new technologies and developments essential to good practice. The book is split into two parts. Part 1 considers the main aspects of theory that relate to scanning and also includes practical tips on gating, equipment use, patient care and safety, and information on contrast media. Part 2 provides step by step instruction for examining each anatomical area, beginning with a basic anatomy section, followed by sections on indications, patient positioning, equipment, artefacts and tips on optimizing image quality. A section of problem-solving exercises completes the book. Now in full color throughout with over 200 illustrations this book will continue to appeal to radiographers new to MRI and regular users who are looking for information on alternative techniques and suggestions on protocol modifications. Completely revised and updated Over 100 brand new photographs and line drawings Written by technologists for technologists With contributions from MRI technologists in the USA and Australia Suitable for users of all types of MRI systems
High Speed Mri Guided Near Infrared Tomography Of Breast Hemodynamics
DOWNLOAD
Author : Zhiqiu Li
language : en
Publisher:
Release Date : 2013-09-07
High Speed Mri Guided Near Infrared Tomography Of Breast Hemodynamics written by Zhiqiu Li and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-09-07 with categories.
Magnetic Resonance Neuroimaging
DOWNLOAD
Author : John Kucharczyk
language : en
Publisher: CRC Press
Release Date : 1993-12-21
Magnetic Resonance Neuroimaging written by John Kucharczyk and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993-12-21 with Science categories.
Magnetic Resonance Neuroimaging is a comprehensive volume that focuses on the newest fields of MRI from functional and metabolic mapping to the latest applications of neuro-interventional techniques. Each chapter offers critical discussions regarding available methods and the most recent advances in neuroimaging, including such topics as the use of diffusion and perfusion MRI in the early detection of stroke, the revolutionary advent of high-speed MRI for non-invasively mapping cortical responses to task activation paradigms, and the principles and applications of contrast agents. The chapters also discuss how these new advances are applied to problems in patients ranging in age from the newborn to the elderly, as well as disease states ranging from metabolic encephalopathy to cardiovascular disorders and stroke. Magnetic Resonance Neuroimaging will be a valuable text/reference for residents, research fellows, and clinicians in radiology, neuroradiology, and magnetic resonance imaging.
High Speed Mri Guided Near Infrared Tomography System To Monitor Breast Hemodynamics In Vivo
DOWNLOAD
Author : Zhiqiu Li
language : en
Publisher:
Release Date : 2011
High Speed Mri Guided Near Infrared Tomography System To Monitor Breast Hemodynamics In Vivo written by Zhiqiu Li and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with Breast categories.
High Speed And Low Power Pipelined Adc Design For Mri Application
DOWNLOAD
Author : Pavan Kumar Ramakrishnaiah
language : en
Publisher:
Release Date : 2014
High Speed And Low Power Pipelined Adc Design For Mri Application written by Pavan Kumar Ramakrishnaiah and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with Analog-to-digital converters categories.
The advancement in the integrated circuit technologies has led to the development of many high speed devices. This lead to the necessity to have a fast and efficient circuit which can provide high computational capability. One such device is an Analog to Digital Converter (ADC). The ADC is one of the most basic components of the any digital or analog circuit when there is an interfacing between the digital system and the real-world which is analog in nature. So this forms a primary and an essential block of a computing digital system. The advancement in the Integrated Circuit (IC) industries has led to the growth in the Medical industries. One such development is the advance magnetic resonant scanners in the market. The Magnetic Resonant Imaging (MRI) is a popular imaging technique over Computed Tomography (CT). The signals captured by the MRI machine is an analog signal which has to be processed by the digital processor. So the MRI machines need to have a faster and high resolution ADC. Since the images captured by the scanner has to be processed for high clarity, the resolution has to be very high. The thesis project focus on designing a high speed Pipelined ADC for MRI applications. A complementary CMOS based 9 bit Pipelined ADC is proposed in this thesis which converts the analog waves into a digital word with minimum number of comparators and thereby increasing the speed and reducing the power of the device. The ADC consist of three stages. Each stage is built using a high speed 3 Bit Flash ADC. The ADC has a high sampling rate up to 5GHz and high resolution of 9 bits. The Direct Current (DC) analysis of the design shows that the design consumes 450mW of power. The layout for the design is implemented with IBM 180nm CMOS technology which consumes an area of 9.24mm2 .
Ultra High Field Neuro Mri
DOWNLOAD
Author : Karin Markenroth Bloch
language : en
Publisher: Elsevier
Release Date : 2023-08-21
Ultra High Field Neuro Mri written by Karin Markenroth Bloch and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-08-21 with Computers categories.
Ultra-High Field Neuro MRI is a comprehensive reference and educational resource on the current state of neuroimaging at ultra-high field (UHF), with an emphasis on 7T. Sections cover the MR physics aspects of UHF, including the technical challenges and practical solutions that have enabled the rapid growth of 7T MRI. Individual chapters are dedicated to the different techniques that most strongly benefit from UHF, as well as chapters with a focus on different application areas in anatomical, functional and metabolic imaging. Finally, several chapters highlight the neurological and psychiatric applications for which 7T has shown benefits. The book is aimed at scientists who develop MR technologies and support clinical and neuroscience research, as well as users who want to benefit from UHF neuro MR techniques in their work. It also provides a comprehensive introduction to the field. Presents the opportunities and technical challenges presented by MRI at ultra-high field Describes advanced ultra-high field neuro MR techniques for clinical and neuroscience applications Enables the reader to critically assess the specific UHF advantages over currently available techniques at clinical field strengths
Modular Scalable Techniques For Advanced Magnetic Resonance Systems And Radio Frequency Instrumentation
DOWNLOAD
Author : Pascal Pawel Stang
language : en
Publisher:
Release Date : 2012
Modular Scalable Techniques For Advanced Magnetic Resonance Systems And Radio Frequency Instrumentation written by Pascal Pawel Stang and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with categories.
Magnetic resonance imaging (MRI) is unique among imaging modalities in providing exceptional versatility for examining a wide spectrum of anatomy and physiological functions. Modern MRI systems are moving toward higher magnetic field strengths for increased signal, and depend on rising receiver and transmitter channel counts to enhance speed, image quality, specificity, and safety. This has left researchers in a predicament. Commercial MRI scanners are becoming ever more capable and complex, yet by their nature inevitably lag the leading edge of science, failing to anticipate new research directions. Moreover, their closed proprietary hardware, software, and interfaces frustrate any expansion or adaptation to new techniques and experiments. Developed to address these challenges, the Medusa MRI console is a modular scalable open platform for advanced MRI research and development. Medusa enables MR methods and applications that would have been challenging or impossible using only commercial hardware, and does so with an efficient flexible architecture designed to grow to meet future needs. The Medusa MRI console delivers the complete set of functionality required for MRI including multi-channel radio-frequency (RF) excitation and reception, gradient waveform generation, coil and amplifier gating, and an open software platform for pulse sequencing and experimental development. Key features of Medusa include the use of direct-conversion digital RF components, distributed processing and memory for modularity and flexibility, and USB 2.0 High-Speed (480Mb/s) interfaces to the host PC. Medusa was first tested with the novel Stanford University Pre-Polarized MRI scanner, and is now used regularly for experiments on a diverse range of commercial and custom-built imaging systems. A significant application of Medusa has been the investigation and development of MRI Parallel Transmit techniques (PTx), which hold promise for improving MR safety and high-field image quality. Yet PTx methods demand high-fidelity delivery of RF pulses at kilowatt power levels across multiple channels into an unknown load. Vector Iterative Predistortion (VIP) was developed to address this challenge, using Medusa to encode the non-ideal response from RF amplifiers using sensors and iteratively pre-distort the input to achieve desired output. Even when used with cost-efficient low-fidelity RF power amps, VIP drives errors to below 0.1~dB and +/-1~degree phase, and is capable of correcting time-dynamic memory effects where traditional look-up table methods fail. Accurate RF sensing is essential in any RF control system, and on-coil and in-line vector RF sensing approaches were developed to enable real-time current, power, and impedance measurements. Notably, this monitoring permits not only the hardware characterization and control needed for VIP, but can also detect patient motion, cardiac and respiratory rhythms, and has the potential to assess and improve MR safety for patients with implanted devices.