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Mechanical Properties Of Soft Tissues With Mr Elastography Technique
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Book Synopsis Mechanical Properties of Soft Tissues with MR Elastography Technique by : Sabine Bensamoun
Download or read book Mechanical Properties of Soft Tissues with MR Elastography Technique written by Sabine Bensamoun and published by John Wiley & Sons. This book was released on 2020-12-15 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The principle of magnetic resonance elastography (MRE) is the focus of this book. The functional and structural properties of the skeletal muscle (in passive and active conditions), the liver and the kidney are characterized in particular. Viscoelatic properties are calculated with multifrequency MRE tests and rheological models and results are compared between MR and ultrasound elastography techniques. MRE is applied to pathological muscles and fibrotic livers to follow the effects of the treatment. The authors also analyze MRE post-processing, a key stage in diagnosis. In later chapters a phantom mimicking the soft tissues is created and a FE model is developed in order to simulate wave displacement.
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 Magnetic Resonance Elastography by : Sebastian Hirsch
Download or read book Magnetic Resonance Elastography written by Sebastian Hirsch and published by John Wiley & Sons. This book was released on 2017-03-20 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt: Magnetic resonance elastography (MRE) is a medical imaging technique that combines magnetic resonance imaging (MRI) with mechanical vibrations to generate maps of viscoelastic properties of biological tissue. It serves as a non-invasive tool to detect and quantify mechanical changes in tissue structure, which can be symptoms or causes of various diseases. Clinical and research applications of MRE include staging of liver fibrosis, assessment of tumor stiffness and investigation of neurodegenerative diseases. The first part of this book is dedicated to the physical and technological principles underlying MRE, with an introduction to MRI physics, viscoelasticity theory and classical waves, as well as vibration generation, image acquisition and viscoelastic parameter reconstruction. The second part of the book focuses on clinical applications of MRE to various organs. Each section starts with a discussion of the specific properties of the organ, followed by an extensive overview of clinical and preclinical studies that have been performed, tabulating reference values from published literature. The book is completed by a chapter discussing technical aspects of elastography methods based on ultrasound.
Book Synopsis Biomechanics of Soft Tissues by : Adil Al Mayah
Download or read book Biomechanics of Soft Tissues written by Adil Al Mayah and published by CRC Press. This book was released on 2018-02-21 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt: The emerging paradigm of incorporating images and biomechanical properties of soft tissues has proven to be an integral part of the advancement of several medical applications, including image guided radiotherapy and surgery, brachytherapy, and diagnostics. This expansion has resulted in a growing community of medical, science, and engineering professionals applying mechanical principles to address medical concerns. This book is tailored to cover a range of mechanical principles, properties, and applications of soft tissues that have previously been addressed in various journals and "anatomical site-specific" books. Biomechanics of Soft Tissues follows a different approach by offering a simplified overview of widely used mechanical models and measuring techniques of soft tissue parameters. This is followed by an investigation of different medical applications, including: biomechanical aspects of cancerous tumor progressions, radiotherapy treatment, and image guided ultrasound guided interventions. Written by leading scholars and professionals in the field, Biomechanics of Soft Tissues combines engineering and medical expertise, thereby producing an excellent source of information for professionals interested in the theoretical and technological advancements related to soft tissues. The book provides medical professionals with an insight on various modeling approaches, testing techniques, and mechanical characteristics that are frequently used by engineers. Conversely, the presented medical applications provide engineers with a glimpse of amazing medical practices and encourage them to expand their roles in the medical field. Provides a simplified overview of mechanics of soft tissues. Highlights different techniques to measure tissues properties for engineering and medical applications. Contains novel ideas to address roles of mechanics in disease progression and treatment. Presents innovative applications of biomechanics in medical procedures.
Book Synopsis Mechanical Evaluation of Structure and Function in Fibrous Soft Tissue Using MR Elastography by : Daniel R. Smith
Download or read book Mechanical Evaluation of Structure and Function in Fibrous Soft Tissue Using MR Elastography written by Daniel R. Smith and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Human soft tissues are highly complex networks comprised of a variety of components that contribute to the overall functionality of the tissue, but these structures can be disrupted through injury or pathology, leading to tissue dysfunction. Magnetic resonance elastography (MRE) is a developing imaging technique that has shown promise in evaluating human soft tissues in-vivo by providing mechanical property estimates that are sensitive to structural changes in these tissues, including sensitivity to pathological changes. While MRE has proved to be an effective technique in much of human soft tissue, fibrous soft tissues, such as brain white matter and skeletal muscle, cause standard assumptions of mechanical isotropy to fail, resulting in data-model mismatches and inaccurate evaluations of tissue integrity and health. In this thesis, we propose to develop and test an MRE method to evaluate the health of fibrous soft tissues by evaluating structural and functional changes from pathology or injury.
Book Synopsis Ultrasound Elastography by : Monica Lupsor-Platon
Download or read book Ultrasound Elastography written by Monica Lupsor-Platon and published by BoD – Books on Demand. This book was released on 2020-03-04 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: Elastography, the science of creating noninvasive images of mechanical characteristics of tissues, has been rapidly evolving in recent years. The advantage of this technique resides in the ability to rapidly detect and quantify the changes in the stiffness of soft tissues resulting from specific pathological or physiological processes. Ultrasound elastography is nowadays applied especially on the liver and breast, but the technique has been increasingly used for other tissues including the thyroid, lymph nodes, spleen, pancreas, gastrointestinal tract, kidney, prostate, and the musculoskeletal and vascular systems. This book presents some of the applications of strain and shear-wave ultrasound elastography in hepatic, pancreatic, breast, and musculoskeletal conditions.
Book Synopsis Numerical Modeling of MR Elastography Experiment by : Quanshangze Du
Download or read book Numerical Modeling of MR Elastography Experiment written by Quanshangze Du and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The diagnosis of various pathologies, including some cancers, has long been based on palpation, since a tumor is significantly stiffer than healthy tissue. More advanced and quantitative methods have been developed over the last decades, especially the Magnetic Resonance Elastography (MRE). This method uses magnetic resonance imaging (MRI) on mechanically stressed tissue to estimate the mechanical properties of soft tissue. The reconstruction of the elasticity modulus of the tissue in MRE is often based on a model with simple behavior laws of the imaged tissue (linear elasticity, isotropy, homogeneity), which could be extended to more complex cases thanks to modeling by the Finite Element Method (FEM) in particular. FEM has been used in MRE to simulate the propagation of mechanical waves in a tissue, to better understand the effects of different parameters on MRE measurements, to reconstruct stiffness, to evaluate novel MRE inversion methods, etc. However, in inhomogeneous cases with complex interfaces, FEM modeling can be particularly costly as it requires an explicit mesh of these interfaces. In this work, we explored, using an explicit dynamic FE solver developed in this thesis, the behavior of mechanical waves propagating in a linear, isotropic, viscoelastic and inhomogeneous medium, in order to better control the parameters of a MRE experiment. In the solver, the eXtended Finite Element Method (XFEM) has been implemented; this formulation of FEM originates from fracture mechanics and has been widely used over the last two decades to model discontinuities such as cracks and inclusions. Using the developed numerical tool, we studied the behavior of waves in the vicinity of an interface (oblique or complex), in particular the phenomena of wave reflection and wave conversion. It has been shown that the use of the XFEM method significantly reduces the computation time while ensuring an equivalent accuracy, in terms of displacement fields and reconstructed stiffness. Furthermore, we have addressed, by simulation, the criterion of establishing the steady state of the waves which must be reached to ensure correct recording by MRI. Today, this criterion is still empirical and can influence the quality of MRE data. We have thus proposed a metric to quantify the achievement of the steady state of wave propagation in a tissue with or without inclusion. Finally, these methods were implemented on a practical case of breast MRE. Based on breast models, we evaluated the influence of experimental parameters (size and position of the inclusion, polarization of the excitation, boundary conditions, etc.) on the achievement of steady state.
Book Synopsis Breast Elastography by : Richard G. Barr
Download or read book Breast Elastography written by Richard G. Barr and published by Thieme. This book was released on 2015-01-28 with total page 601 pages. Available in PDF, EPUB and Kindle. Book excerpt: This comprehensive reference covers the principles and techniques used in performing breast elastography, an innovative imaging technology that can dramatically reduce the need for biopsies. The book begins with an introduction of the techniques, followed by sections on how to perform each technique and methods of interpretation, and concludes with more than 60 detailed case studies. Key Features: Includes case studies covering a wide range of breast pathologies and illustrating the use of all available elastography techniques to help radiologists obtain the best images for each pathology Covers all methods of breast elastography, including sheer wave and strain wave Contains more than 200 high-quality color images that demonstrate how to perform each technique Breast Elastography is an essential reference for all radiologists, residents and fellows, and sonographers involved in breast imaging and evaluation.
Book Synopsis Tissue Elasticity Imaging by : S. Kaisar Alam
Download or read book Tissue Elasticity Imaging written by S. Kaisar Alam and published by Elsevier. This book was released on 2019-11-22 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tissue Elasticity Imaging: Volume One: Theory and Methods offers an extensive treatment of the fundamentals and applications of this groundbreaking diagnostic modality. The book introduces elasticity imaging, its history, the fundamental physics, and the different elasticity imaging methods, along with their implementation details, problems and artefacts. It is an essential resource for all researchers and practitioners interested in any elasticity imaging modality. As many diseases, including cancers, alter tissue mechanical properties, it is not always possible for conventional methods to detect changes, but with elasticity images that are produced by slow tissue deformation or low-frequency vibration, these changes can be displayed. - Offers the first comprehensive reference on elasticity imaging - Discusses the fundamentals of technology and their limitations and solutions, along with advanced methods and future directions - Addresses the technologies and applications useful to both researchers and clinical practitioners - Includes an online reference section regularly updated with advances in technology and applications
Book Synopsis Measurement of Soft Tissue Elasticity in Vivo by : Yan-Ping Huang
Download or read book Measurement of Soft Tissue Elasticity in Vivo written by Yan-Ping Huang and published by CRC Press. This book was released on 2015-11-04 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt: The product of 20 years of research, this book covers topics in soft tissue elasticity in vivo, from measurement techniques to clinical applications. It provides, for the first time, a single source that systematically introduces the various techniques for in vivo measurement of soft tissue elasticity in an effort to ease the difficulty between lea
Book Synopsis Material Parameter Identification and Inverse Problems in Soft Tissue Biomechanics by : Stéphane Avril
Download or read book Material Parameter Identification and Inverse Problems in Soft Tissue Biomechanics written by Stéphane Avril and published by Springer. This book was released on 2016-10-12 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt: The articles in this book review hybrid experimental-computational methods applied to soft tissues which have been developed by worldwide specialists in the field. People developing computational models of soft tissues and organs will find solutions for calibrating the material parameters of their models; people performing tests on soft tissues will learn what to extract from the data and how to use these data for their models and people worried about the complexity of the biomechanical behavior of soft tissues will find relevant approaches to address this complexity.
Book Synopsis Physical Principles of Medical Ultrasonics by : C. R. Hill
Download or read book Physical Principles of Medical Ultrasonics written by C. R. Hill and published by John Wiley & Sons. This book was released on 2005-08-05 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt: The physical properties of ultrasound, particularly its highly directional beam behaviour, and its complex interactions with human tissues, have led to its becoming a vitally important tool in both investigative and interventional medicine, and one that still has much exciting potential. This new edition of a well-received book treats the phenomenon of ultrasound in the context of medical and biological applications, systematically discussing fundamental physical principles and concepts. Rather than focusing on earlier treatments, based largely on the simplifications of geometrical acoustics, this book examines concepts of wave acoustics, introducing them in the very first chapter. Practical implications of these concepts are explored, first the generation and nature of acoustic fields, and then their formal descriptions and measurement. Real tissues attenuate and scatter ultrasound in ways that have interesting relationships to their physical chemistry, and the book includes coverage of these topics. Physical Principles of Medical Ultrasonics also includes critical accounts and discussions of the wide variety of diagnostic and investigative applications of ultrasound that are now becoming available in medicine and biology. The book also encompasses the biophysics of ultrasound, its practical applications to therapeutic and surgical objectives, and its implications in questions of hazards to both patient and operator.
Book Synopsis Passive Elastography by : Ali Zorgani
Download or read book Passive Elastography written by Ali Zorgani and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of this thesis was the development of a new approach called passive elastography. This approach is inspired from noise correlation methods well developed in seismology and time reversal technics in acoustics. Passive elastography uses shear waves naturally induced in the human body to extract its mechanical properties of soft tissue. The feasibility of this method was tested in several applications. First in ultrasound, slow frame rate ultrasound scanner was used to monitor high intensity focused ultrasound treatment on porcine pancreas. Then, an ultrafast ultrasound scanner was used to retrieve shear wave speed map in a calibrated phantom and in-vivo. Second, Magnetic resonance elastography was implemented to image natural motion in the brain of healthy volunteers and conduct shear wavelength tomography. Third, of ophthalmological and dermatological applications, optical coherence passive elastography was tested in a phantom and a cornea of healthy mouse. Also, a fully optical setup was established to image surface wave for elastography applications. Finally, the resolution limit of elastography was measured using and ultrasound ultrafast scanner.
Book Synopsis Handbook of MRI Pulse Sequences by : Matt A. Bernstein
Download or read book Handbook of MRI Pulse Sequences written by Matt A. Bernstein and published by Elsevier. This book was released on 2004-09-21 with total page 1041 pages. Available in PDF, EPUB and Kindle. Book excerpt: Magnetic Resonance Imaging (MRI) is among the most important medical imaging techniques available today. There is an installed base of approximately 15,000 MRI scanners worldwide. Each of these scanners is capable of running many different "pulse sequences", which are governed by physics and engineering principles, and implemented by software programs that control the MRI hardware. To utilize an MRI scanner to the fullest extent, a conceptual understanding of its pulse sequences is crucial. Handbook of MRI Pulse Sequences offers a complete guide that can help the scientists, engineers, clinicians, and technologists in the field of MRI understand and better employ their scanner. - Explains pulse sequences, their components, and the associated image reconstruction methods commonly used in MRI - Provides self-contained sections for individual techniques - Can be used as a quick reference guide or as a resource for deeper study - Includes both non-mathematical and mathematical descriptions - Contains numerous figures, tables, references, and worked example problems
Book Synopsis Physical Properties of Tissues by : Francis Duck
Download or read book Physical Properties of Tissues written by Francis Duck and published by Academic Press. This book was released on 2013-10-22 with total page 357 pages. Available in PDF, EPUB and Kindle. Book excerpt: This unique reference book describes quantitatively the measured and predicted values of all the physical properties of mammalian tissue. Reported measurements are thoroughly documented and are complemented by a range of empirical mathematical models which describe the observed physical behavior of tissue.**Intended as a broad-ranging reference, this volume gives the bioengineer, physicist, radiologist, or physiologist access to a literature which may not be known in detail. It will also be of value for those concerned with the study of a range of environmental radiation hazards.Most extensive compilation of values of physical properties of tissue**Presents data for thermal, optical, ultrasonic, mechanical, x-ray, electrical, and magnetic resonance properties**Comprehensive bibliography
Book Synopsis Improvement and Evaluation of Nonlinear Inversion MR Elastography by : McGarry; Matthew D. J.
Download or read book Improvement and Evaluation of Nonlinear Inversion MR Elastography written by McGarry; Matthew D. J. and published by . This book was released on 2013 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: Magnetic resonance elastography (MRE) is a technique to produce images of the mechanical properties of tissue, which are indicative of a variety of diseases. Tissue motions measured using MRI are used to solve an inverse problem to recover mechanical properties through a non-linear inversion (NLI) approach. The inverse problem is ill-conditioned; sucess depends on sufficient data quality, careful algorithm design and effective regularization. This work develops and evaluates a robust MRE platform suitable for a variety of in vivo applications by addressing each of these three issues. A signal to noise ratio (SNR) measure for the motion data based on the octahedral shear strain is presented for MRE, where motion-based SNR measures are commonly used. Data with a strain SNR above three consistently reconstructs well for a wide variety of applications, such a threshold does not exist for motion SNR measures. A target SNR is invaluable for design and evaluation of MRE data collection protocols. NLI MRE requires discretization of both the displacement and mechanical property fields. The resolution requirements for these two discretizations are different: the displacement FE mesh must be fine enough to limit discretization error to an acceptable level, whereas a coarse mechanical property resolution stabilizes the mechanical property estimates. Previous single mesh implementations force a tradeoff between the competing resolution requirements. A more flexible framework for MRE is developed incorporating multi-resolution FE meshes to allow independent discretizations of the displacements and each mechanical property parameter. Accurate anatomical information is readily available from other MRI sequences, soft prior regularization (SPR) is implemented in MRE to utilize this spatial information in the reconstruction process, which stabilizes the inversion and produces more accurate property estimates. Results in phantoms and brain tissue demonstrate accurate contrast recovery with low sensitivity to the choice of regularization weighting. An alternative fluid pressure calculation for poroelastic MRE is also presented, and poroelastic and viscoelastic MRE reconstructions of brain tissue are compared. Finally, a series of phantoms and processing strategies were designed to produce standard imaging evaluation metrics and allow explicit evaluation of MRE processing algorithms.
Book Synopsis Ultrasound Elastography for Biomedical Applications and Medicine by : Ivan Z. Nenadic
Download or read book Ultrasound Elastography for Biomedical Applications and Medicine written by Ivan Z. Nenadic and published by John Wiley & Sons. This book was released on 2018-10-25 with total page 919 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultrasound Elastography for Biomedical Applications and Medicine Ivan Z. Nenadic, Matthew W. Urban, James F. Greenleaf, Mayo Clinic Ultrasound Research Laboratory, Mayo Clinic College of Medicine, USA Jean-Luc Gennisson, Miguel Bernal, Mickael Tanter, Institut Langevin – Ondes et Images, ESPCI ParisTech CNRS, France Covers all major developments and techniques of Ultrasound Elastography and biomedical applications The field of ultrasound elastography has developed various techniques with the potential to diagnose and track the progression of diseases such as breast and thyroid cancer, liver and kidney fibrosis, congestive heart failure, and atherosclerosis. Having emerged in the last decade, ultrasound elastography is a medical imaging modality that can noninvasively measure and map the elastic and viscous properties of soft tissues. Ultrasound Elastography for Biomedical Applications and Medicine covers the basic physics of ultrasound wave propagation and the interaction of ultrasound with various media. The book introduces tissue elastography, covers the history of the field, details the various methods that have been developed by research groups across the world, and describes its novel applications, particularly in shear wave elastography. Key features: Covers all major developments and techniques of ultrasound elastography and biomedical applications. Contributions from the pioneers of the field secure the most complete coverage of ultrasound elastography available. The book is essential reading for researchers and engineers working in ultrasound and elastography, as well as biomedical engineering students and those working in the field of biomechanics.
