Download or read book 4D Flow MRI Post processing Strategies for Neuropathologies written by and published by . This book was released on 2015 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: 4D flow MRI allows for the measurement of a dynamic 3D velocity vector field. Blood flow velocities in large vascular territories can be qualitatively visualized with the added benefit of quantitative probing. Within cranial pathologies theorized to have vascular-based contributions or effects, 4D flow MRI provides a unique platform for comprehensive assessment of hemodynamic parameters. Targeted blood flow derived measurements, such as flow rate, pulsatility, retrograde flow, or wall shear stress may provide insight into the onset or characterization of more complex neuropathologies. Therefore, the thorough assessment of each parameter within the context of a given disease has important medical implications. Not surprisingly, the last decade has seen rapid growth in the use of 4D flow MRI. Data acquisition sequences are available to researchers on all major scanner platforms. However, the use has been limited mostly to small research trials. One major reason that has hindered the more widespread use and application in larger clinical trials is the complexity of the post-processing tasks and the lack of adequate tools for these tasks. Post-processing of 4D flow MRI must be semi-automated, fast, user-independent, robust, and reliably consistent for use in a clinical setting, within large patient studies, or across a multicenter trial. Development of proper post-processing methods coupled with systematic investigation in normal and patient populations pushes 4D flow MRI closer to clinical realization while elucidating potential underlying neuropathological origins. Within this framework, the work in this thesis assesses venous flow reproducibility and internal consistency in a healthy population. A preliminary analysis of venous flow parameters in healthy controls and multiple sclerosis patients is performed in a large study employing 4D flow MRI. These studies are performed in the context of the chronic cerebrospinal venous insufficiency hypothesis. Additionally, a double-gated flow acquisition and reconstruction scheme demonstrates respiratory-induced changes in internal jugular vein flow. Finally, a semi-automated intracranial vessel segmentation and flow parameter measurement software tool for fast and consistent 4D flow post-processing analysis is developed, validated, and exhibited an in-vivo.
Download or read book Post processing Strategies in Functional MRI of the Human Brain written by Richard Baumgartner and published by . This book was released on 1998 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Improved Correction Reconstruction and Analysis Methods for 4D flow MRI written by and published by . This book was released on 2015 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: 4D-Flow Magnetic Resonance Imaging allows for the measuring of dynamic vascular hemodynamics with full volumetric coverage and sub millimeter resolution. While successful clinical applications of this technique are plentiful, many vascular pathologies are difficult to image due to the presence of imaging artifacts and insufficient velocity to noise ratios. These errors can in turn prevent some visualization techniques such as streamlines from being used to their full potential. This dissertation describes multiple methods of improving the capabilities of 4D flow MRI, including correction methods, an improved reconstruction, and a visualization technique for computing virtual injections. Phase aliasing errors are corrected with a novel 4D Laplacian unwrapping method that allows for simple and robust unwrapping of 4D flow data. The method is tested in digital flow phantoms, volunteers, and patients with coarcatations or arterial venous malformations. Additionally, methods of improving data quality by enforcing physical constraints in the form of divergence-free methods are tested as a post-processing step, and used in the development of a phase-regularized reconstruction. Acceleration-induced displacement is also isolated as a significant source of error, and correction methods are developed and tested, particularly to improve streamline visualizations in the brain. Finally, with the use of the previously discussed correction methods and a modified version of probabilistic streamlines, a method for generating 'virtual injections' with 4D flow data is introduced and investigated.
Download or read book Adult Hydrocephalus written by Daniele Rigamonti and published by Cambridge University Press. This book was released on 2014-02-06 with total page 331 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides guidelines for managing this grossly underdiagnosed and undertreated condition, focusing on early detection and timely, effective interventions.
Download or read book Fetal MRI written by Daniela Prayer and published by Springer Science & Business Media. This book was released on 2011-02-15 with total page 531 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the most comprehensive book to be written on the subject of fetal MRI. It provides a practical hands-on approach to the use of state-of-the-art MRI techniques and the optimization of sequences. Fetal pathological conditions and methods of prenatal MRI diagnosis are discussed by organ system, and the available literature is reviewed. Interpretation of findings and potential artifacts are thoroughly considered with the aid of numerous high-quality illustrations. In addition, the implications of fetal MRI are explored from the medico-legal and ethical points of view. This book will serve as a detailed resource for radiologists, obstetricians, neonatologists, geneticists, and any practitioner wanting to gain an in-depth understanding of fetal MRI technology and applications. In addition, it will provide a reference source for technologists, researchers, students, and those who are implementing a fetal MRI service in their own facility.
Download or read book Neurovascular Imaging written by Luca Saba and published by Springer. This book was released on 2016-01-25 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vascular Neurology, Vascular Neurosurgery and Interventional Neuroradiology are independent fields with dedicated Training Programs. Neuroimaging, and in particular what we call "Neurovascular Imaging" is a unifying factor which can be considered the intersection of these three medical specialties. With this book we aim to cover thoroughly the imaging techniques, potentialities, and present and future applications as applied to all the vascular diseases of the central nervous system from the imaging point of view. This book will comprise eight main sections: (1) The Basics, (2) Arteries of the Head and Neck (3) The basics of Intracranial Arteries (4) Diseases of the vessels (5) Stroke Imaging (6) Veins Imaging (7) Spine Imaging (8) Pediatrics.
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.
Download or read book Imaging in Acute Stroke New Options and State of the Art written by Anders Fogh Christensen and published by Frontiers Media SA. This book was released on 2018-09-05 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt: One in six suffers a stroke during their lifetime and stroke remains the major cause of new onset disability in adulthood. The worldwide burden of stroke is increasing due to an ageing population, however, globally haft of stroke victims are young. Stroke is the clinical diagnosis of an acute vascular incident and covers a multitude of pathophysiological causes. The clinician needs imaging to make decisions on acute treatment as well as to plan a secondary prevention strategy: a non-contrast CT and a Duplex of the carotids followed by an aspirin as a one size fits all strategy does not always provide sufficient support for those decisions. Presently, fast, generally available, and non-invasive imaging provides new possibilities of establishing a cause of stroke, provide specific information on the brain parenchyma – including possibly salvageable tissue and micro-bleeds – as well as allowing for more specific prognostication in acute stroke. This eBook covers both ischemic and haemorrhagic stroke and includes hot topics such as micro-bleeds, salvageable tissue and spot-sign, clinically challenging issues including movement artefacts in MRI as well as an overview of present options including pragmatic and feasible suggestions for an approach to state of the art acute imaging.
Download or read book PanVascular Medicine written by Peter Lanzer and published by Springer. This book was released on 2015-03-30 with total page 5004 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vascular management and care has become a truly multidisciplinary enterprise as the number of specialists involved in the treatment of patients with vascular diseases has steadily increased. While in the past, treatments were delivered by individual specialists, in the twenty-first century a team approach is without doubt the most effective strategy. In order to promote professional excellence in this dynamic and rapidly evolving field, a shared knowledge base and interdisciplinary standards need to be established. Pan Vascular Medicine, 2nd edition has been designed to offer such an interdisciplinary platform, providing vascular specialists with state-of-the art descriptive and procedural knowledge. Basic science, diagnostics, and therapy are all comprehensively covered. In a series of succinct, clearly written chapters, renowned specialists introduce and comment on the current international guidelines and present up-to-date reviews of all aspects of vascular care.
Download or read book Advanced Imaging and Bio Techniques for Convergence Science written by Jun Ki Kim and published by Springer Nature. This book was released on 2021-04-08 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a wide-ranging guide to advanced imaging techniques and related methods with important applications in translational research or convergence science as progress is made toward a new era in integrative healthcare. Conventional and advanced microscopic imaging techniques, including both non-fluorescent (i.e., label-free) and fluorescent methods, have to date provided researchers with specific and quantitative information about molecules, cells, and tissues. Now, however, the different imaging techniques can be correlated with each other and multimodal methods developed to simultaneously obtain diverse and complementary information. In addition, the latest advanced imaging techniques can be integrated with non-imaging techniques such as mass spectroscopic methods, genome editing, organic/inorganic probe synthesis, nanomedicine, and drug discovery. The book will be of high value for researchers in the biological and biomedical sciences or convergence science who need to use these multidisciplinary and integrated techniques or are involved in developing new analytical methods focused on convergence science.
Download or read book The Stroke Book written by Michel T. Torbey and published by Cambridge University Press. This book was released on 2013-07-18 with total page 395 pages. Available in PDF, EPUB and Kindle. Book excerpt: An essential companion for busy professionals seeking to navigate stroke-related clinical situations successfully and make quick informed treatment decisions.
Download or read book The Human Brain During the Second Trimester written by Shirley A. Bayer and published by CRC Press. This book was released on 2005-05-09 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt: The brain in the second trimester, the subject of Volume 3, is nearing anatomical maturity throughout the brainstem. In contrast, the neurogenesis and neuronal migration are still in progress in the cerebral cortex and cerebellum. Consequently, the authors chose to focus on the migration, sojourning, and settling of the neuronal populations belo
Download or read book Brain Neurotrauma written by Firas H. Kobeissy and published by CRC Press. This book was released on 2015-02-25 with total page 718 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the contribution from more than one hundred CNS neurotrauma experts, this book provides a comprehensive and up-to-date account on the latest developments in the area of neurotrauma including biomarker studies, experimental models, diagnostic methods, and neurotherapeutic intervention strategies in brain injury research. It discusses neurotrauma mechanisms, biomarker discovery, and neurocognitive and neurobehavioral deficits. Also included are medical interventions and recent neurotherapeutics used in the area of brain injury that have been translated to the area of rehabilitation research. In addition, a section is devoted to models of milder CNS injury, including sports injuries.
Download or read book Machine Learning in Clinical Neuroimaging and Radiogenomics in Neuro oncology written by Seyed Mostafa Kia and published by Springer Nature. This book was released on 2020-12-30 with total page 319 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the refereed proceedings of the Third International Workshop on Machine Learning in Clinical Neuroimaging, MLCN 2020, and the Second International Workshop on Radiogenomics in Neuro-oncology, RNO-AI 2020, held in conjunction with MICCAI 2020, in Lima, Peru, in October 2020.* For MLCN 2020, 18 papers out of 28 submissions were accepted for publication. The accepted papers present novel contributions in both developing new machine learning methods and applications of existing methods to solve challenging problems in clinical neuroimaging. For RNO-AI 2020, all 8 submissions were accepted for publication. They focus on addressing the problems of applying machine learning to large and multi-site clinical neuroimaging datasets. The workshop aimed to bring together experts in both machine learning and clinical neuroimaging to discuss and hopefully bridge the existing challenges of applied machine learning in clinical neuroscience. *The workshops were held virtually due to the COVID-19 pandemic.
Download or read book Brain Function and Responsiveness in Disorders of Consciousness written by Martin M. Monti and published by Springer. This book was released on 2015-11-30 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides up-to-date information on all aspects of brain function and responsiveness in patients with severe disorders of consciousness. Topics considered include the mechanisms and measures of consciousness; perfusional, metabolic, and fMRI markers of responsiveness; responsiveness to pain; the role of brain–computer interface techniques; electrophysiology; cortical excitability; autonomic responsiveness; the natural history of vegetative and minimally conscious states; and prediction of outcome. Brain neuroimaging has documented residual responsiveness in the vegetative state. The scientific impact of this seminal evidence has generated a schism between neuroscience and the clinical criteria defining consciousness and responsiveness. Our current understanding of human consciousness must be reconsidered also in view of the emotional impact on the public and the far-reaching implications for diagnosis, prognosis, medical treatment, human costs, medical and individual responsibility, logistics, healthcare, ethics, etc. It is hoped that this book will help to bridge the gap between neuroscience and clinical routine.
Download or read book Brain Arteriovenous Malformations written by Vladimír Beneš and published by Springer. This book was released on 2017-10-06 with total page 239 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reviews the natural course of arteriovenous malformation (AVM) disease and the active treatment modalities. These are compared with surgical and neuropsychological results achieved at the Military University Hospital, Prague, Czech Republic. Based on these comparisons, treatment recommendation for AVM is articulated. Furthermore, the long-term efficacy of different treatment is discussed. This book is written by an international group of European authors, and is aimed at neurovascular surgeons and neurosurgical residents.
Download or read book Shape Analysis in Medical Image Analysis written by Shuo Li and published by Springer Science & Business Media. This book was released on 2014-01-28 with total page 441 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains thirteen contributions from invited experts of international recognition addressing important issues in shape analysis in medical image analysis, including techniques for image segmentation, registration, modelling and classification and applications in biology, as well as in cardiac, brain, spine, chest, lung and clinical practice. This volume treats topics such as for example, anatomic and functional shape representation and matching; shape-based medical image segmentation; shape registration; statistical shape analysis; shape deformation; shape-based abnormity detection; shape tracking and longitudinal shape analysis; machine learning for shape modeling and analysis; shape-based computer-aided-diagnosis; shape-based medical navigation; benchmark and validation of shape representation, analysis and modeling algorithms. This work will be of interest to researchers, students and manufacturers in the fields of artificial intelligence, bioengineering, biomechanics, computational mechanics, computational vision, computer sciences, human motion, mathematics, medical imaging, medicine, pattern recognition and physics.
