Download or read book An Improved Planning Protocol for the Endovascular Treatment of Intracranial Aneurysms written by Dale Louise Wilson and published by . This book was released on 1998 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book An Improved Planning Protocol for the Endovascular Treatment of Intracranial Aneurisms written by Dale Louise Wilson and published by . This book was released on 1998 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Computer aided Planning for Endovascular Treatment of Intracranial Aneurysms written by Eleni Sgouritsa and published by . This book was released on 2010 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Endovascular Treatment of Intracranial Aneurysms written by James Byrne and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive review of current endovascular techniques for the treatment of cerebral aneurysms, this is a practical manual for those practicing, or intending to practice, this rapidly expanding branch of minimally invasive surgery. The authors provide descriptions based on an extensive combined experience of clinical management, technical problems, complications and recent results, and discuss the limitations and role of combined extravasular/endovascular techniques.

Download or read book Medical Image Computing and Computer Assisted Intervention MICCAI 99 written by Chris Taylor and published by Springer. This book was released on 2006-09-10 with total page 1331 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the refereed proceedings of the Second International Conference on Medical Image Computing and Computer-Assisted Intervention, MICCAI'99, held in Cambridge, UK, in September 1999. The 133 revised full papers presented were carefully reviewed and selected from a total of 213 full-length papers submitted. The book is divided into topical sections on data-driven segmentation, segmentation using structural models, image processing and feature detection, surfaces and shape, measurement and interpretation, spatiotemporal and diffusion tensor analysis, registration and fusion, visualization, image-guided intervention, robotic systems, and biomechanics and simulation.

Download or read book Flow Diversion of Cerebral Aneurysms written by Min S. Park and published by Thieme. This book was released on 2017-10-24 with total page 397 pages. Available in PDF, EPUB and Kindle. Book excerpt: Seminal resource on state-of-the-art flow diversion techniques from leading neurointerventional experts From detachable balloons and GDC coils to the recent advent of flow diversion, practitioners of endovascular neurosurgery have been fortunate to work in an era of rapid and exciting advances. The first commercially available flow diverter in the U.S. was approved specifically for a small subset of cerebral aneurysms. Recent experience has demonstrated its utility in treating challenging or otherwise untreatable aneurysms, safely and efficaciously. The design of these devices requires learning radically different methods than those used in the deployment of other, non-braided stents. Flow Diversion of Cerebral Aneurysms by Min Park, Philipp Taussky, Felipe Albuquerque, and Cameron McDougall provides step-by-step guidance on utilization of flow diversion technology in clinical practice. Reflecting the combined experience and knowledge of pioneers in neurointerventional surgery, this comprehensive book fills a gap in available resources. Twenty-one chapters cover fundamentals to advanced concepts – historical perspective to future developments. Key Features More than 100 high quality graphics and illustrative case studies reinforce key concepts Techniques and nuances of Pipeline, Silk (Balt Extrusion), Surpass Streamline, and Flow-Redirection Endoluminal Device (FRED) deployment An overview of current flow diversion devices, discussion of coil embolization versus flow diversion, off-label uses, adjuvant approaches, and hemodynamic modifications Pharmacology, flow diversion grading scales, and post-procedure radiographic imaging Clinical pearls on ruptured aneurysms, intraprocedural/postprocedural complications, and management of aneurysm residuals The ultimate goal of incorporating cutting-edge flow diversion techniques into the aneurysm treatment paradigm is improved efficacy and patient outcome. The knowledge gleaned from this outstanding resource will help residents and fellows learn to deploy flow diverters for the first time and enable seasoned clinicians to expand their neurointerventional radiology skills.

Download or read book New Insight into Cerebrovascular Diseases written by Patricia Bozzetto Ambrosi and published by BoD – Books on Demand. This book was released on 2020-05-13 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt: “Brain circulation is a true road map that consists of large extended navigation territories and a number of unimagined and undiscovered routes.” Dr. Patricia Bozzetto Ambrosi This book combines an update on the review of cerebrovascular diseases in the form of textbook chapters, which has been carefully reviewed by Dr. Patricia Bozzetto Ambrosi, Drs. Rufai Ahmad and Auwal Abdullahi and Dr. Amit Agrawal, high-performance academic editors with extensive experience in neurodisciplines, including neurology, neurosurgery, neuroscience, and neuroradiology, covering the best standards of neurological practice involving basic and clinical aspects of cerebrovascular diseases. Each topic was carefully revised and prepared using smooth, structured vocabulary, plus superb graphics and scientific illustrations. In emphasizing the most common aspects of cerebrovascular diseases: stroke burden, pathophysiology, hemodynamics, diagnosis, management, repair, and healing, the book is comprehensive but concise and should become the standard reference guide for this neurological approach.

Download or read book Computational and Experimental Investigation Into the Hemodynamics of Endovascularly Treated Cerebral Aneurysms written by Michael Barbour and published by . This book was released on 2018 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis investigates the influence of mechanical stresses and fluid motion on the efficacy of endovascular treatment methods for cerebral aneurysms. The two primary endovascular treatments, embolic coils and flow-diverting stents, are designed to reduce blood-flow and stress inside the aneurysm volume - creating an environment that enables the development of a stable intra-luminal thrombus. Successful embolization of an aneurysm eliminates the risk of aneurysm rupture. Unfortunately, endovascular aneurysm treatments have a high rate of failure, leaving the patient at risk of rupture and warranting further intervention. The hemodynamic environment inside of aneurysms, both before and after treatment, likely plays a crucial role in the healing process. In this thesis, we hope to improve the clinical outcomes of endovascularly treated aneurysms by characterizing the hemodynamic modifications caused by endovascular treatments and developing clinically accessible tools that are predictive of treatment outcome. The primary work of this thesis is the development of a computational framework that predicts the outcomes of endovascularly treated cerebral aneurysms based on computed hemodynamic metrics. In collaboration with Harboview Medical Center, we create patient-specific computational simulations of the hemodynamic environment, both before and after endovascular treatment. Changes in the aneurysmal hemodynamics are then compared to the outcomes of each treatment, assessed 18 months following endovascular repair. The model developed in this thesis, importantly, incorporates patient-specific velocity and pressure measurements which improves the accuracy of the model, and, thus, it's clinical applicability. The results from this study have shown that significant differences exist between the hemodynamic environments in successful and unsuccessful cerebral aneurysm treatments, suggesting that the model is predictive of treatment outcome. Aneurysms successfully treated with flow-diverting stents are found to have a larger reduction in aneurysmal flow-rate and aneurysm WSS following treatment than those aneurysm that did not fully heal. Coiled aneurysms that failed treatment are found to have a significantly larger increase in shear at the neck of the aneurysm following treatment than successfully coiled aneurysms. The results from this study improve our fundamental understanding of treatment induced aneurysmal hemodynamic changes and moves hemodynamic based prediction of treatment outcomes closer to the realm of patient care and treatment planning. In a second study, we characterize the hemodynamics of idealized cerebral aneurysms treated with flow-diverting stents. Using stereo particle image velocimetry (PIV), we measure the flow-field in silicone idealized aneurysm models following flow-diverting stent treatment. The parameter space explored in this study is the flow-rate and curvature of the parent-vessel, or parent-vessel Reynolds and Dean number. Flow-diverting stents are found to significantly reduce the velocity inside the aneurysm, creating an aneurysmal flow-environment that is viscous dominated, despite inertial dominated parent-vessel flow. Thus, at low values of Dean number, flow enters the aneurysm at the leading edge and remains attached to the aneurysm wall before exiting at the downstream edge, rotating with the direction of the parent-vessel flow, characteristics similar to Stokes flow over a cavity. As the Dean number is increased, the flow along the leading edge begins to separate, and the recirculation region grows, until, above a Dean number of 180, the flow inside the aneurysm is fully recirculating. The magnitude of flow entering the aneurysm is also found to increase as a function of parent-vessel Dean number. Flow-diverting stents are designed to achieve aneurysm occlusion by sufficiently reducing the amount of blood-flow entering the aneurysm so a thrombus can begin to form. The results from this study, however, show that aneurysms attached to vessel with a high Dean number are subjected to large values of aneurysmal flow, which may compromise the effectiveness of the flow-diverting stent treatments. In the final part of this thesis, we investigate the accuracy of a modeling technique commonly used in the simulation of blood flow in coiled cerebral aneurysms. Rather than resolve the complex structure of a deployed mass of coils inside an aneurysm, the porous media model approximates the resistance of the coil mass by numerically adding a momentum sink term to the volume of the aneurysm sac. The porous-media approach is the gold-standard for simulating blood-flow through embolic coils due to its numerical efficiency, however, its accuracy and limitations have never been assessed. In this study, we compared the accuracy of simulations that rely on the porous media model to simulations that resolve the coil-mass. Deployed coil geometries are obtained from high-resolution, synchrotron radiation based micro-CT scans of patient-specific silicon models of aneurysms "treated" with embolic coils. The porous media model is shown to both over- and under-estimate shear stress inside the aneurysm dome, and systematically over-estimate the flow-rate of blood entering the aneurysm. Using homogenization methods we analyzed the complex coil-structures in four treated aneurysm and developed an improved porous media model for each aneurysm that better accounts for the complex structure of the deployed coils. Simulations that incorporate the improved porous media model are shown to be more accurate than the standard approach, improving the clinical utility of the simulation results.

Download or read book Endovascular Treatment of Intracranial Aneurysms written by Mohamed Nasr Shadad and published by . This book was released on 2009 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Giant Intracranial Aneurysms written by Naci Kocer and published by Springer. This book was released on 2016-10-26 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: This atlas focuses on the imaging and treatment options available for giant intracranial aneurysms since 1990s in the beginning of the so-called modern endovascular era. During this period, there were significant advances made in the therapy of small intracranial aneurysms though the treatment of giant aneurysms continued to pose an insurmountable challenge. At the turn of this century, this grim scenario gradually improved with better understanding of the pathophysiology of giant intracranial aneurysms. This changed scenario in giant intracranial aneurysm therapy has been illustrated with the aid of informative clinical case studies. The clinical presentation of giant aneurysms in adults and children is described as are the merits of different imaging modalities explained and illustrated. Extensive consideration has been given to modern fusion imaging that has improved our insight into the nature of the disease. Endovascular treatment approaches (including illustrative open surgical approaches) and reconstructive and deconstructive strategies are fully documented, with careful attention given to factors that influence management strategies, treatment choice and complications.The atlas will be a valuable reference and practical aid for neuroradiologists, neurosurgeons, neurologists, fellowship trainees, postgraduate & graduate students.

Download or read book Durability of Endovascular Treatment for Intracranial Aneurysms written by Sandra Pauline Ferns and published by . This book was released on 2010 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Endovascular Management of Cerebrovascular Disease An Issue of Neurosurgery Clinics of North America written by Ricardo A. Hanel and published by Elsevier Health Sciences. This book was released on 2014-07-28 with total page 257 pages. Available in PDF, EPUB and Kindle. Book excerpt: This issue serves as a high-level topic review and keeps the readers updated on current and future neurointervention directions.

Download or read book Cerebral Aneurysms written by Robert R. Smith and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt: Surgical repair of cerebral aneurysms is a core aspect of neurosurgical practice. While open microvascular technique has dominated Western surgical practice, surgeons in the former USSR have developed endovascular techniques that have gained acceptance among surgeons here. This text demonstrates both surgical and endovascular approaches, written and illustrated by surgeons with vast experience in both, in a comparative context. The work is extensively illustrated with full-color surgical illustrations, line drawings, and radiographs.

Download or read book Intracranial Vascular Malformations and Aneurysms written by Michael Forsting and published by Springer Science & Business Media. This book was released on 2005-12-29 with total page 259 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes the pathoanatomical, pathophysiological, and imaging features of vascular malformations and aneurysms of the brain and the modern, minimally invasive endovascular methods or techniques employed in their treatment. Individual chapters are devoted to venous malformations, capillary telangiectasias and cavernomas, pial arteriovenous malformations, dural arteriovenous malformations, and intracranial aneurysms. Each chapter is subdivided into four principal sections on pathology, clinical presentation, diagnostic imaging, and therapy, ensuring a standardized approach throughout. The book is richly illustrated with numerous informative CT, MR and DSA images.

Download or read book Successful Candidates for the Degrees of D Phil M Litt M Sc and Diploma in Law with Titles of Their Theses written by University of Oxford and published by . This book was released on 1998 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Medical Image Computing and Computer assisted Intervention written by and published by . This book was released on 1999 with total page 1278 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Finite Element Modeling of Endovascular Intervention Enables Hemodynamic Characterization of Intracranial Aneurysm Treatment Strategies written by Robert J. Damiano and published by . This book was released on 2014 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: Intracranial aneurysms (IAs) are localized dilations in cerebral blood vessels which occur in up to roughly 5% of the general population. Conventional aneurysm treatment strategies like surgical clipping are invasive, lengthy, and risky. On the other hand, endovascular interventions like coiling are minimally-invasive and have been successfully used as an alternative to surgical clipping. Recently, flow diversion has emerged as a novel endovascular strategy to treat previously difficult-to-treat IAs. Despite their high clinical success rates, post-treatment complications such as aneurysm recurrence in coiled IAs and incomplete occlusion or delayed rupture in flow diverter (FD)-treated IAs have been reported in the literature. Since endovascular devices work primarily by modifying aneurysmal flow, treatment outcomes likely depend on the specific device(s) and intervention strategy used for each patient-specific case. Therefore, assessment of the effects of endovascular devices on post-treatment hemodynamics could be crucial in understanding the mechanisms by which specific treatment strategies affect treatment outcomes. This work focused on finite element modeling of coils and flow diverters as well as their deployment, which enabled a robust means of simulating post-treatment hemodynamics in patient-specific aneurysms via computational fluid dynamics (CFD). In Chapter 2, a new finite element method (FEM)-based coiling technique is introduced as well as an efficient deployment strategy for overlapping FDs using the previously established high fidelity virtual stenting method (HiFiVS) for FDs. In Chapter 3, these modeling strategies were used to investigate four endovascular treatment strategies in a patient-specific IA: coiling (1-8 coils), single FD, FD with adjunctive coils (1-8 coils), and overlapping FDs. Post-treatment hemodynamics was simulated via CFD and qualitative and quantitative flow characteristics were analyzed. In Chapter 4, three patient-specific clinical FD intervention cases were recapitulated in silico and their post-treatment hemodynamics were analyzed and compared with the real clinical outcomes. The results of these studies elucidate new insights to the effects of coiling and flow diversion on post-treatment hemodynamics. In addition, our findings highlight the potential for virtual intervention, in conjunction with CFD, to be used as a tool in treatment planning. These tools could help asses, before treatment, the impact of various intervention strategies for each patient-specific case, in hopes of improving treatment outcomes.