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Super Resolution Reconstruction Of Cardiac Mr Images
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Book Synopsis Super-Resolution Reconstruction of Cardiac Mr Images by : Sami Ur Rahman
Download or read book Super-Resolution Reconstruction of Cardiac Mr Images written by Sami Ur Rahman and published by LAP Lambert Academic Publishing. This book was released on 2011-10 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: The high number of cardiac diseases in the developed countries cause a strong interest in tools and technology for the early detection of any cardiac dysfunction. There, cardiac magnetic resonance imaging (MRI) plays a key role for the non-invasive examination of the beating heart. Unfortunately, In cardiac MR images the slice thickness is normally greater than the pixel size within the slices. In general, better segmentation and analysis results can be expected for isotropic high-resolution (HR) data sets. If two orthogonal data sets, e. g. short-axis (SA) and long-axis (LA) volumes are combined, an increase in resolution can be obtained. In this book we employ a super-resolution reconstruction (SRR) algorithm for computing high-resolution data sets from two orthogonal SA and LA volumes. We conclude that image quality is dramatically enhanced by applying an SRR technique especially for cardiac MR images where the resolution in slice-selection direction is about five times lower than within the slices.
Book Synopsis Magnetic Resonance Image Reconstruction by : Mehmet Akcakaya
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
Book Synopsis Deep Learning-Based Image Reconstruction in Abdominal and Cardiac Magnetic Resonance Imaging (MRI) by : Chang Gao
Download or read book Deep Learning-Based Image Reconstruction in Abdominal and Cardiac Magnetic Resonance Imaging (MRI) written by Chang Gao and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: MRI plays an important role in abdominal and cardiac imaging due to its excellent soft tissue contrast and high image resolution. Despite the benefit of excellent image quality, MRI acquisition is intrinsically slow, causing patient discomfort and slowing down the clinical workflow, which hinders its broad clinical use. For decades, undersampling reconstruction techniques have been investigated to accelerate MRI acquisition. Traditional parallel imaging and compressed sensing methods either have limited acceleration capability or require extensive computational and time resources. While the recent development of deep learning achieved unprecedented performance in image reconstruction and image enhancement tasks, there are challenges remaining to be solved. One challenge is the potential loss of image details due to network over-smooths or over-regularization. Another challenge is that networks may struggle to generalize well to diverse MRI data acquired under different conditions. In medical imaging, high-quality diverse datasets are challenging to acquire, especially for rare or specialized MRI applications. Lastly, for non-Cartesian sampling, the reconstruction can be challenging due to the need for time-consuming interpolation of non-Cartesian k-space onto a Cartesian basis. The overall goal of the dissertation is to contribute to the development of deep learning-based accelerated image reconstruction techniques and investigate the challenges in network development as mentioned above. Specifically, we aim to develop deep learning networks to improve image quality and reduce artifacts and noise for the application of (1) undersampled radial MRI reconstruction in the abdomen (aims 1 and 2), and (2) ferumoxytol-enhanced cardiac cine MRI reconstruction (aim 3). In aim 1, I developed a generative adversarial network using paired undersampled and ground truth images to reduce streaking artifacts and preserve image sharpness. In aim 2, I developed a radial k-space prediction framework by training an attention-based transformer network on k-space data. By combining the acquired and predicted k-space data, the reconstructed images will have an improved signal-to-noise ratio and fewer streaking artifacts. In aim 3, I developed an unrolled spatiotemporal deep learning network for ferumoxytol-enhanced cardiac cine MRI reconstruction. The network was trained using non-contrast-enhanced bSSFP cine images and can be successfully generalized to ferumoxytol-enhanced images.
Book Synopsis Super-resolution Reconstruction of Three-dimensional Magnetic Resonance Images Using Deep and Transfer Learning by : Jakub Jurek
Download or read book Super-resolution Reconstruction of Three-dimensional Magnetic Resonance Images Using Deep and Transfer Learning written by Jakub Jurek and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Deep Learning and Data Labeling for Medical Applications by : Gustavo Carneiro
Download or read book Deep Learning and Data Labeling for Medical Applications written by Gustavo Carneiro and published by Springer. This book was released on 2016-10-07 with total page 289 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the refereed proceedings of two workshops held at the 19th International Conference on Medical Image Computing and Computer-Assisted Intervention, MICCAI 2016, in Athens, Greece, in October 2016: the First Workshop on Large-Scale Annotation of Biomedical Data and Expert Label Synthesis, LABELS 2016, and the Second International Workshop on Deep Learning in Medical Image Analysis, DLMIA 2016. The 28 revised regular papers presented in this book were carefully reviewed and selected from a total of 52 submissions. The 7 papers selected for LABELS deal with topics from the following fields: crowd-sourcing methods; active learning; transfer learning; semi-supervised learning; and modeling of label uncertainty.The 21 papers selected for DLMIA span a wide range of topics such as image description; medical imaging-based diagnosis; medical signal-based diagnosis; medical image reconstruction and model selection using deep learning techniques; meta-heuristic techniques for fine-tuning parameter in deep learning-based architectures; and applications based on deep learning techniques.
Book Synopsis Basic Principles of Cardiovascular MRI by : Mushabbar A. Syed
Download or read book Basic Principles of Cardiovascular MRI written by Mushabbar A. Syed and published by Springer. This book was released on 2015-10-29 with total page 337 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a comprehensive and authoritative text on the expanding scope of CMR, dedicated to covering basic principles in detail focusing on the needs of cardiovascular imagers. The target audience for this book includes CMR specialists, trainees in CMR and cardiovascular medicine, cardiovascular physicists or clinical cardiovascular imagers. This book includes figures and CMR examples in the form of high-resolution still images and is divided in two sections: basic MRI physics, i.e. the nuts and bolts of MR imaging; and imaging techniques (pulse sequences) used in cardiovascular MR imaging. Each imaging technique is discussed in a separate chapter that includes the physics and clinical applications (with cardiovascular examples) of a particular technique. Evolving techniques or research based techniques are discussed as well. This section covers both cardiac and vascular imaging. Cardiovascular magnetic resonance (CMR) imaging is now considered a clinically important imaging modality for patients with a wide variety of cardiovascular diseases. Recent developments in scanner hardware, imaging sequences, and analysis software have led to 3-dimensional, high-resolution imaging of the cardiovascular system. These developments have also influenced a wide variety of cardiovascular imaging applications and it is now routinely used in clinical practice in CMR laboratories around the world. The non-invasiveness and lack of ionizing radiation exposure make CMR uniquely important for patients whose clinical condition requires serial imaging follow-up. This is particularly true for patients with congenital heart disease (CHD) with or without surgical corrections who require lifelong clinical and imaging follow-up.
Book Synopsis Coronary Magnetic Resonance Angiography by : Andre J. Duerinckx
Download or read book Coronary Magnetic Resonance Angiography written by Andre J. Duerinckx and published by Springer Science & Business Media. This book was released on 2002 with total page 355 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent years, there has been increasing interest in the clinical applications of coronary angiography techniques. Coronary MRA can be instrumental in the evaluation of congenital coronary artery anomalies, however, the complexity of advanced MR pulse sequences and strategies may be overwhelming to many. Coronary MR Angiography demystifies the art of coronary MRA by providing a text in plain language with clearly illustrated imaging steps and protocols. Designed to bridge the gap between radiology and cardiology, it is written for physicians and scientists planning to incorporate this technique into their research or practice.
Book Synopsis Prior Based MR Reconstruction for Super Resolution MR Imaging by :
Download or read book Prior Based MR Reconstruction for Super Resolution MR Imaging written by and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Medical Image Computing and Computer-Assisted Intervention - MICCAI 2016 by : Sebastien Ourselin
Download or read book Medical Image Computing and Computer-Assisted Intervention - MICCAI 2016 written by Sebastien Ourselin and published by Springer. This book was released on 2016-10-17 with total page 666 pages. Available in PDF, EPUB and Kindle. Book excerpt: The three-volume set LNCS 9900, 9901, and 9902 constitutes the refereed proceedings of the 19th International Conference on Medical Image Computing and Computer-Assisted Intervention, MICCAI 2016, held in Athens, Greece, in October 2016. Based on rigorous peer reviews, the program committee carefully selected 228 revised regular papers from 756 submissions for presentation in three volumes. The papers have been organized in the following topical sections: Part I: brain analysis, brain analysis - connectivity; brain analysis - cortical morphology; Alzheimer disease; surgical guidance and tracking; computer aided interventions; ultrasound image analysis; cancer image analysis; Part II: machine learning and feature selection; deep learning in medical imaging; applications of machine learning; segmentation; cell image analysis; Part III: registration and deformation estimation; shape modeling; cardiac and vascular image analysis; image reconstruction; and MR image analysis.
Book Synopsis Magnetic Resonance Imaging by : Lachezar Manchev
Download or read book Magnetic Resonance Imaging written by Lachezar Manchev and published by BoD – Books on Demand. This book was released on 2019-07-17 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt: Diagnostic imaging has undergone many changes over the last several years. Technical developments have defined Magnetic Resonance Imaging (MRI) as the leading diagnostic modality in different diseases. MRI is definitive and sensitive and the current requirements of medicine call for radiologists to be proficient in its use. This book provides complete and detailed information about the fast-developing field of MRI from physicians, radiologists, and other clinical specialists. It is a practical guide to using MRI in areas such as cardiology and pulmonology, among others.
Book Synopsis Advanced Reconstruction Techniques in Free-breathing Multi-contrast High-resolution Cardiac Magnetic Resonance Imaging by : Aurelien Bustin
Download or read book Advanced Reconstruction Techniques in Free-breathing Multi-contrast High-resolution Cardiac Magnetic Resonance Imaging written by Aurelien Bustin and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Magnetic Resonance Elastography by : Sudhakar K. Venkatesh
Download or read book Magnetic Resonance Elastography written by Sudhakar K. Venkatesh and published by Springer. This book was released on 2014-10-01 with total page 143 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first book to cover the groundbreaking development and clinical applications of Magnetic Resonance Elastography, this book is essential for all practitioners interested in this revolutionary diagnostic modality. The book is divided into three sections. The first covers the history of MRE. The second covers technique and clinical applications of MRE in the liver with respect to fibrosis, liver masses, and other diseases. Case descriptions are presented to give the reader a hands-on approach. The final section presents the techniques, sequence and preliminary results of applications in other areas of the body including muscle, brain, lung, heart, and breast.
Book Synopsis Parallel Imaging in Clinical MR Applications by : Stefan O. Schönberg
Download or read book Parallel Imaging in Clinical MR Applications written by Stefan O. Schönberg and published by Springer Science & Business Media. This book was released on 2007-01-11 with total page 548 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the first in-depth introduction to parallel imaging techniques and, in particular, to the application of parallel imaging in clinical MRI. It will provide readers with a broader understanding of the fundamental principles of parallel imaging and of the advantages and disadvantages of specific MR protocols in clinical applications in all parts of the body at 1.5 and 3 Tesla.
Book Synopsis MRI from Picture to Proton by : Donald W. McRobbie
Download or read book MRI from Picture to Proton written by Donald W. McRobbie and published by Cambridge University Press. This book was released on 2017-04-13 with total page 405 pages. Available in PDF, EPUB and Kindle. Book excerpt: MR is a powerful modality. At its most advanced, it can be used not just to image anatomy and pathology, but to investigate organ function, to probe in vivo chemistry, and even to visualise the brain thinking. However, clinicians, technologists and scientists struggle with the study of the subject. The result is sometimes an obscurity of understanding, or a dilution of scientific truth, resulting in misconceptions. This is why MRI from Picture to Proton has achieved its reputation for practical clarity. MR is introduced as a tool, with coverage starting from the images, equipment and scanning protocols and traced back towards the underlying physics theory. With new content on quantitative MRI, MR safety, multi-band excitation, Dixon imaging, MR elastography and advanced pulse sequences, and with additional supportive materials available on the book's website, this new edition is completely revised and updated to reflect the best use of modern MR technology.
Book Synopsis Reconstruction, Segmentation, and Analysis of Medical Images by : Maria A. Zuluaga
Download or read book Reconstruction, Segmentation, and Analysis of Medical Images written by Maria A. Zuluaga and published by Springer. This book was released on 2017-01-18 with total page 177 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the refereed proceedings of two workshops held at the 19th International Conference on Medical Image Computing and Computer-Assisted Intervention, MICCAI 2016, in Athens, Greece, in October 2016: the First International Workshop on Reconstruction and Analysis of Moving Body Organs, RAMBO 2016, and the First International Workshop on Whole-Heart and Great Vessel Segmentation from 3D Cardiovascular MRI in Congenital Heart Disease, HVSMR 2016. The 17 revised regular papers presented in this book were carefully reviewed and selected from a total of 21 submissions. The papers cover following topics: Registration; Reconstruction; Deep learning for heart segmentation; Discrete optimization and probabilistic intensity modeling; Atlas-based strategies; Random forests.
Book Synopsis High Resolution MR Imaging of the Arrhythmogenic Cardiac Substrate by : Marylène Delcey
Download or read book High Resolution MR Imaging of the Arrhythmogenic Cardiac Substrate written by Marylène Delcey and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cardiovascular magnetic resonance (CMR) is the clinical imaging modality of reference for characterizing anatomical substrate of pathological hearts. In addition to its high diagnostic value resulting from versatile contrasts it can generate, CMR has also a potential interest in interventional imaging for guiding in real-time minimally or non-invasive therapies. However, current spatial resolution of MRI images in clinical scanners remains limited to 1 mm at best, which provides insufficient value for diagnosis and for precise visualization of atrial walls (2 to 5 mm thickness) or for characterizing thermal lesions during interventional procedures. Limited signal-to-noise ratio provided by large receiver coils, together with cardiac and respiratory motions are limiting factors that justify technical developments to increase the value of cardiac MRI. This thesis work aimed at proposing innovative solutions to alleviate the aforementioned challenges, through a combined development of dedicated hardware and software.In order to increase the signal-to-noise ratio of MRI and improve spatial selectivity onto the heart, a receive-only surface coil prototype was designed and interfaced with the scanner. We demonstrate that with such a small coil, a gain in SNR of approximately 30 can be achieved and that good quality images with a spatial resolution of 200 μm in-plane can be obtained at clinical field both on ex vivo samples of fixed hearts and on beating hearts.In a second part of the work, motion compensation techniques were investigated exploiting MR-compatible micro-coils embodied on a catheter. A home-made acquisition sequence was implemented, combining rapid (~27 ms) and precise (less than 1 mm uncertainty) 3D measurements of the coil position interleaved with acquisition of several radial k-space lines. Retrospective sorting of raw-data as a function of micro-coil positions allowed reconstruction of good quality images from highly under sampled k-spaces using nonlinear algorithms (compress sensing, total variation, nuFFT). Validation was first assessed on a mobile calibration phantom depicting linear and rotating trajectories with realistic parameters (60-90 bpm, 2 cm amplitude). Then, in vivo evaluation was performed in sheep and in pig to illustrate efficiency of the method and compare it to conventional synchronization with ECG and respiratory sensors.In an attempt to combine high-resolution imaging with motion compensation technique, a preliminary study was conducted that combines imaging with our local surface coil and catheter-based motion compensation using our implemented acquisition sequence and associated reconstruction algorithm. Results obtained in vivo shows the potential of such a technique for providing motion-free high resolved images of the ventricle wall at 300 μm in-plane spatial resolution.These technologies being later intended for human use, safety aspects inherent to insertion of a MRI receiver coil inside the body were also investigated. Since thermal damage is the main risk associated with inserted devices, a MRI-thermometry technique that interleaves acquisition of several gradient echo EPI slices every second and an energy deposition module with adjustable parameters was implemented to quantify temperature evolution in tissue surrounding an implanted wire. Experiments in gel and in human brain demonstrated feasibility to measure temperature change with 0.2°C certainty. Such a precision was considered sufficient to evaluate device safety. The method could therefore be used to establish individualized safety levels for RF exposure in the presence of implanted device (such as an intravascular coil).This thesis work presents the first technical steps toward high-resolution motion free CMR. Applications are better substrate definition for enhanced diagnosis and improved lesion characterization during MR-guided interventional procedures.
Book Synopsis Pocket Atlas of Cardiac MRI by : Pamela K. Woodard
Download or read book Pocket Atlas of Cardiac MRI written by Pamela K. Woodard and published by Lippincott Williams & Wilkins. This book was released on 2005 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: Incorporating the latest advances in MR technology and cardiac imaging, this pocket atlas is a rapid guide to interpretation of cardiac MR images. This edition features over 120 sharp new images of normal anatomy and abnormalities and includes new sections on coronary arteries, thoracic MR angiography, three-dimensional surface anatomy, surgical repairs, and imaging protocols. Each page presents a high-resolution image, with anatomic landmarks clearly labeled. Above the image is a key to the labels and a thumbnail illustration that orients readers to the plane of view (sagittal, axial, or coronal). This format enables readers to identify features quickly and accurately.
