Download or read book A Subspace Approach to Accelerated Cardiovascular Magnetic Resonance Imaging written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Subspace Approach to High resolution Magnetic Resonance Spectroscopic Imaging written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Cardiovascular Magnetic Resonance Imaging written by Raymond Y. Kwong and published by Springer. This book was released on 2019-01-31 with total page 473 pages. Available in PDF, EPUB and Kindle. Book excerpt: The significantly updated second edition of this important work provides an up-to-date and comprehensive overview of cardiovascular magnetic resonance imaging (CMR), a rapidly evolving tool for diagnosis and intervention of cardiovascular disease. New and updated chapters focus on recent applications of CMR such as electrophysiological ablative treatment of arrhythmias, targeted molecular MRI, and T1 mapping methods. The book presents a state-of-the-art compilation of expert contributions to the field, each examining normal and pathologic anatomy of the cardiovascular system as assessed by magnetic resonance imaging. Functional techniques such as myocardial perfusion imaging and assessment of flow velocity are emphasized, along with the exciting areas of artherosclerosis plaque imaging and targeted MRI. This cutting-edge volume represents a multi-disciplinary approach to the field, with contributions from experts in cardiology, radiology, physics, engineering, physiology and biochemistry, and offers new directions in noninvasive imaging. The Second Edition of Cardiovascular Magnetic Resonance Imaging is an essential resource for cardiologists and radiologists striving to lead the way into the future of this important field.

Download or read book Handbook of Cardiovascular Magnetic Resonance Imaging written by Gerald M. Pohost and published by CRC Press. This book was released on 2006-10-27 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cardiovascular Magnetic Resonance (CMR) is well established in clinical practice for the diagnosis and management of a wide array of cardiovascular diseases. This expertly written source offers a wealth of information on the application and performance of CMR for diagnosis and evaluation of treatment.

Download or read book Scan Acceleration and Motion Correction for Cardiovascular Magnetic Resonance Imaging written by Jieying Luo and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Magnetic resonance imaging (MRI) is a powerful medical imaging modality providing excellent soft-tissue contrast without exposing the patient to ionizing radiation. In particular, MRI plays a critical role in the diagnosis and management of cardiovascular disease with the possibility of obtaining a wide range of anatomical and functional information in a single examination. However, despite technical advancements such as parallel imaging and compressed sensing, the scan time of cardiovascular MRI is still relatively long compared to X-ray or CT. The temporal resolution for functional assessment is limited, and compensation for respiratory and cardiac motion remains challenging. To improve the temporal resolution, an undersampling acquisition scheme and a low-rank matrix-completion reconstruction method recovering the missing data are developed and applied to perfusion imaging in the lower extremities. To exploit the spatial-temporal information redundancy, the proposed method formulates the image construction as an optimization problem with the low-rank constraint and the data-consistency constraint. With the proposed method, dynamic contrast-enhanced perfusion imaging in the lower extremities with high temporal resolution (3 s) and volumetric coverage ( 32x16x32 cm3) is achieved. Pulse sequence design is another approach to achieve scan acceleration. Recognizing that the region of interest (ROI) is smaller than the full spatial extent of the anatomy in coronary magnetic resonance angiography (MRA), a new magnetization preparation sequence that combines outer volume suppression with T2 preparation is designed and implemented, enabling accelerated free-breathing whole-heart coronary MRA with enhanced blood-myocardium contrast in a scan time of less than 3 minutes by reducing the image field-of-view. Two nonrigid motion-correction methods are also developed to reduce the motion artifacts generated during the scan. These two methods extract several motion trajectories from 3D image-based navigators (iNAVs) and compensate for them with an autofocusing algorithm. A bank of motion-corrected images is generated by motion correction with every motion trajectory, and the final image is assembled on a pixel-by-pixel basis with the best-focused pixel chosen from the bank of images according to a localized gradient entropy metric. The first method is developed for free-breathing whole-heart coronary MRA in which the motion is complicated and nonrigid. Both global rigid motion and localized nonrigid motion are extracted from the 3D iNAVs. The second method is designed for abdominal MRA, in which the imaging volume is divided into ROIs with different 3D translational motion patterns. An automatic ROI-clustering method is developed and a translational motion trajectory is estimated for every ROI. Both motion correction methods demonstrate improved vessel sharpness in the in vivo studies. The image reconstruction method, pulse sequence and motion-correction methods developed enable scan acceleration and motion correction to address several challenges in cardiovascular MRI. These methods show promise of extending the diagnostic utility of MRI in this application.

Download or read book Cardiovascular Magnetic Resonance E Book written by Warren J. Manning and published by Elsevier Health Sciences. This book was released on 2010-04-05 with total page 668 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cardiovascular Magnetic Resonance provides you with up-to-date clinical applications of cardiovascular MRI for the broad spectrum of cardiovascular diseases, including ischemic, myopathic, valvular, and congenital heart diseases, as well as great vessel and peripheral vascular disease. Editors Warren J. Manning and Dudley J. Pennell and their team of international contributors cover everything from basic MR physics to sequence design, flow quantification and spectroscopy to structural anatomy and pathology. Learn the appropriate role for CMR in a variety of clinical settings with reference to other modalities, practical limitations, and costs. With the latest information on contrast agents, MR angiography, MR spectroscopy, imaging protocols, and more, this book is essential for both the beginner and expert CMR practitioner. Covers both the technical and clinical aspects of CMR to serve as a comprehensive reference. Demonstrates the full spectrum of the application of cardiac MR from ischemic heart disease to valvular, myopathic, pericardial, aortic, and congenital heart disease. Includes coverage of normal anatomy, orientation, and function to provide you with baseline values. Discusses advanced techniques, such as interventional MR, to include essential information relevant to the specialist. Features appendices with acronyms and CMR terminology used by equipment vendors that serve as an introduction to the field. Uses consistent terminology and abbreviations throughout the text for clarity and easy reference. Covers both the technical and clinical aspects of CMR to serve as a comprehensive reference. Demonstrates the full spectrum of the application of cardiac MR from ischemic heart disease to valvular, myopathic, pericardial, aortic, and congenital heart disease. Includes coverage of normal anatomy, orientation, and function to provide you with baseline values. Discusses advanced techniques, such as interventional MR, to include essential information relevant to the specialist. Features appendices with acronyms and CMR terminology used by equipment vendors that serve as an introduction to the field. Uses consistent terminology and abbreviations throughout the text for clarity and easy reference.

Download or read book Accelerated Magnetic Resonance Cardiovascular Imaging and Velocimetry Using Undersampled Radial Acquisitions written by and published by . This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Magnetic Resonance Imaging (MRI) is a non-invasive technique that can be utilized for cardiovascular assessment of the human body. Unfortunately, MRI is a slow process. This has prevented MRI from reaching its full potential in many clinical situations due to excessive scan times. For example, besides providing anatomical measures of the vascular system, MRI can measure blood velocities that can be used to calculate parameters such as flow, pressure gradients, and wall shear stresses within aneurysms. It is hypothesized that a better understanding of these parameters could be used in risk assessment to reduce un-necessary and potentially risky treatment. However, the clinical utility of MRI to obtain comprehensive volumetric velocity measurements with adequate spatial and temporal resolutions has been hampered by unfeasible scan times. The goal of the first part of this thesis is to develop, implement, and test a new method to image and assess hemodynamic conditions of small intracranial aneurysms with high spatial resolution within clinically feasible imaging times. The second part of this thesis addresses coronary artery disease with two different techniques. The first investigates a proposed approach to early detection by assessing the perfusion of blood from the coronary arteries into the micro-vasculature of the myocardium tissue. The second method deals with post-detection, specifically on assessing the viability of potentially damaged tissue. Through a combination of sampling and reconstruction, this work aims to extend both perfusion and viability methods from two-dimensional acquisitions to four-dimensional acquisitions (three spatial + time). Besides increasing spatial coverage and SNR, free breathing acquisition was used to reduce patient discomfort. Magnetic resonance imaging offers fast ways to track interventional devices. However, coupling between the micrcoils used for tracking and the phased array imaging coils reduce the ability to accurately determine device position. The final part of this thesis addresses the issue of inductive coupling in catheter tracking by developing a robust method to estimate the coupling coefficients. This improves accuracy by allowing the inductively coupled background signal to be removed from the tracking signal.

Download or read book Cardiovascular Magnetic Resonance written by Warren J. Manning and published by Elsevier Health Sciences. This book was released on 2018-04-26 with total page 672 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides state-of-the-art coverage of CMR technologies and guidelines, including basic principles, imaging techniques, ischemic heart disease, right ventricular and congenital heart disease, vascular and pericardium conditions, and functional cardiovascular disease. Includes new chapters on non-cardiac pathology, pacemaker safety, economics of CMR, and guidelines as well as new coverage of myocarditis and its diagnosis and assessment of prognosis by cardiovascular magnetic resonance, and the use of PET/CMR imaging of the heart, especially in sarcoidosis. Features more than 1,100 high-quality images representing today’s CMR imaging. Covers T1, T2 and ECV mapping, as well as T2* imaging in iron overload, which has been shown to save lives in patients with thalassaemia major Discusses the cost-effectiveness of CMR.

Download or read book Magnetic Resonance Image Reconstruction written by Mehmet Akcakaya and published by Academic Press. This book was released on 2022-11-04 with total page 518 pages. Available in PDF, EPUB and Kindle. Book excerpt: Magnetic Resonance Image Reconstruction: Theory, Methods and Applications presents the fundamental concepts of MR image reconstruction, including its formulation as an inverse problem, as well as the most common models and optimization methods for reconstructing MR images. The book discusses approaches for specific applications such as non-Cartesian imaging, under sampled reconstruction, motion correction, dynamic imaging and quantitative MRI. This unique resource is suitable for physicists, engineers, technologists and clinicians with an interest in medical image reconstruction and MRI. Explains the underlying principles of MRI reconstruction, along with the latest research“/li> Gives example codes for some of the methods presented Includes updates on the latest developments, including compressed sensing, tensor-based reconstruction and machine learning based reconstruction

Download or read book Cardiovascular Magnetic Resonance Imaging written by Raymond Y. Kwong and published by . This book was released on 2019 with total page 473 pages. Available in PDF, EPUB and Kindle. Book excerpt: The significantly updated second edition of this important work provides an up-to-date and comprehensive overview of cardiovascular magnetic resonance imaging (CMR), a rapidly evolving tool for diagnosis and intervention of cardiovascular disease. New and updated chapters focus on recent applications of CMR such as electrophysiological ablative treatment of arrhythmias, targeted molecular MRI, and T1 mapping methods. The book presents a state-of-the-art compilation of expert contributions to the field, each examining normal and pathologic anatomy of the cardiovascular system as assessed by magnetic resonance imaging. Functional techniques such as myocardial perfusion imaging and assessment of flow velocity are emphasized, along with the exciting areas of artherosclerosis plaque imaging and targeted MRI. This cutting-edge volume represents a multi-disciplinary approach to the field, with contributions from experts in cardiology, radiology, physics, engineering, physiology and biochemistry, and offers new directions in noninvasive imaging. The Second Edition of Cardiovascular Magnetic Resonance Imaging is an essential resource for cardiologists and radiologists striving to lead the way into the future of this important field.

Download or read book Mayo Clinic Guide to Cardiac Magnetic Resonance Imaging written by Kiaran McGee and published by Mayo Clinic Scientific Press. This book was released on 2015 with total page 337 pages. Available in PDF, EPUB and Kindle. Book excerpt: This clinical resource of cardiac MR imaging is a straightforward how-to text for technologists, physicians and physicists.

Download or read book Cardiovascular Magnetic Resonance written by E. Nagel and published by Springer Science & Business Media. This book was released on 2004-08-25 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The accompanying CD-ROM contains additional figures and numerous videos." -- p. [4] of cover.

Download or read book Improvements to Highly Accelerated Parallel Magnetic Resonance Imaging written by Richard Winkelmann and published by . This book was released on 2007 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Simultaneous multiparametric and multidimensional cardiovascular magnetic resonance imaging written by Aleksandra Radjenovic and published by Frontiers Media SA. This book was released on 2023-06-30 with total page 141 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Magnetic Resonance of the Heart and Great Vessels written by J. Bogaert and published by Springer. This book was released on 1999 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Magnetic resonance imaging is rapidly becoming a preferred noninvasive modality for the assessment of cardiovascular disease. This book is designed to appeal both to general radiologists and to clinicians. Introductory chapters cover the essential features of the technique. Thereafter a comprehensive overview of current clinical applications is provided by recognized authorities in the field.

Download or read book Application Tailored Accelerated Magnetic Resonance Imaging Methods written by Ziwu Zhou and published by . This book was released on 2018 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: Magnetic resonance imaging (MRI) is a powerful diagnostic medical imaging technique that provides very high spatial resolution. By manipulating the signal evolution through careful imaging sequence design, MRI can generate a wide range of soft-tissue contrast unique to individual application. However, imaging speed remains an issue for many applications. In order to increase scan output without compromising the image quality, the data acquisition and image reconstruction methods need to be designed to fit each application to achieve maximum efficiency. This dissertation concerns several application-tailored accelerated imaging methods through improved sequence design, efficient k-space traverse, as well as tailored image reconstruction algorithm, all together aiming to exploit the full potential of data acquisition and image reconstruction in each application. The first application is ferumoxtyol-enhanced 4D multi-phase cardiovascular MRI on pediatric patients with congenital heart disease. By taking advantage of the high signal-to-noise ratio (SNR) results from contrast enhancement, we introduced two methods to improve the scan efficiency with maintained clinical utility: one with reduced scan time and one with improved temporal resolution. The first method used prospective Poisson-disc under-sampling in combination with graphics processing unit accelerated parallel imaging and compressed sensing combined reconstruction algorithm to reduce scan time by approximately 50% while maintaining highly comparable image quality to un-accelerated acquisition in a clinically practical reconstruction time. The second method utilized a motion weighted reconstruction technique to increase temporal resolution of acquired data, and thus permits improved cardiac functional assessment. Compared with existing acceleration method, the proposed method has nearly three times lower computation burden and six times faster reconstruction speed, all with equal image quality. The second application is noncontrast-enhanced 4D intracranial MR angiography with arterial spin labeling (ASL). Considering the inherently low SNR of ASL signal, we proposed to sample k-space with the efficient golden-angle stack-of-stars trajectory and reconstruct images using compressed sensing with magnitude subtraction as regularization. The acquisition and reconstruction strategy in combination produces images with detailed vascular structures and clean background. At the same time, it allows a reduced temporal blurring delineation of the fine distal arteries when compared with the conventional k-space weighted image contrast (KWIC) reconstruction. Stands upon on this, we further developed an improved stack-of-stars radial sampling strategy for reducing streaking artifacts in general volumetric MRI. By rotating the radial spokes in a golden angle manner along the partition-encoding direction, the aliasing pattern due to under-sampling is modified, resulting in improved image quality for gridding and more advanced reconstruction methods. The third application is low-latency real-time imaging. To achieve sufficient frame rate, real-time MRI typically requires significant k-space under-sampling to accelerate the data acquisition. At the same time, many real-time application, such as interventional MRI, requires user interaction or decision making based on image feedback. Therefore, low-latency on-the-fly reconstruction is highly desirable. We proposed a parallel imaging and convolutional neural network combined image reconstruction framework for low-latency and high quality reconstruction. This is achieved by compacting gradient descent steps resolved from conventional parallel imaging reconstruction as network layers and interleaved with convolutional layers in a general convolutional neural network. Once all parameters of the network are determined during the off-line training process, it can be applied to unseen data with less than 100ms reconstruction time per frame, while more than 1s is usually needed for conventional parallel imaging and compressed sensing combined reconstruction.

Download or read book Cardiovascular Magnetic Resonance Imaging Contemporary Cardiology written by Zachary Garcia and published by . This book was released on 2019-06-07 with total page 291 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cardiovascular magnetic resonance imaging or cardiac MRI is a non-invasive imaging technology used for the assessment of the cardiovascular system. It has a significant role in evidence-based therapeutic and diagnostic pathways in cardiovascular disease, especially the surgical planning in complex heart diseases. It has applications in the assessment of cardiovascular disorders, such as myocarditis, cardiomyopathies, myocardial ischemia and viability, congenital heart disease, besides others. The development of CMR is an active area of research and is witnessing innovation in terms of better and improved techniques. This book explores all the important aspects of cardiovascular magnetic resonance imaging in the present day scenario. The various studies that are constantly contributing towards advancing technologies and the evolution of this field are examined in detail. Students, researchers, experts and all associated with cardiology and medical imaging will benefit alike from this book.