Download or read book Antenna and System Design for Controlled Delivery of Microwave Thermal Ablation written by Hojjatollah Fallahi and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Microwave ablation is an established minimally invasive modality for thermal ablation of unresectable tumors and other diseases. The goal of a microwave ablation procedure is to deliver microwave power in a manner localized to the targeted tissue, with the objective of raising the target tissue to ablative temperatures (~60 °C). Engineering efforts in microwave applicator design have largely been focused on the design of microwave antennas that yield large, near-spherical ablation zones, and can fit within rigid needles or flexible catheters. These efforts have led to significant progress in the development and clinical application of microwave ablation systems, particularly for treating tumors in the liver and other highly vascular organs. However, currently available applicator designs are ill-suited to treating targets of diverse shapes and sizes. Furthermore, there are a lack of non-imaging-based techniques for monitoring the transient progression of the ablation zone as a means for providing feedback to the physician. This dissertation presents the design, implementation, and experimental evaluation of microwave ablation antennas for site-specific therapeutic applications with these issues in mind. A deployable 915 MHz loop antenna is presented, providing a minimally-invasive approach for thermal ablation of the endometrial lining of the uterus for treatment of heavy menstrual bleeding. The antenna incorporates a radiating loop, which can be deployed to adjustable shapes within the uterine cavity, and a passive element, to enable thermal ablation, to 5.7-9.6 mm depth, of uterine cavities ranging in size from 4-6.5 cm in length and 2.5-4.5 cm in width. Electromagnetic-bioheat transfer simulations were employed for design optimization of the antennas, and proof-of-concept applicators were fabricated and extensively evaluated in ex vivo tissue. Finally, feasibility of using the broadband antenna reflection coefficient for monitoring the ablation progress during the course of ablation was evaluated. Experimental studies demonstrated a shift in antenna resonant frequency of 50 MHz correlated with complete ablation. For treatment of 1-2 cm spherical targets, water-cooled monopole antennas operating at 2.45 and 5.8 GHz were designed and experimentally evaluated in ex vivo tissue. The technical feasibility of using these applicators for treating 1-2 cm diameter benign adrenal adenomas was demonstrated. These studies demonstrated the potential of using minimally-invasive microwave ablation applicators for treatment of hypertension caused by benign aldosterone producing adenomas. Since tissue dielectric properties have been observed to change substantially at elevated temperatures, knowledge of the temperature-dependence of tissue dielectric properties may provide a means for estimating treatment state from changes in antenna reflection coefficient during a procedure. The broadband dielectric properties of bovine liver, an established tissue for experimental characterization of microwave ablation applicators, were measured from room temperature to ablative temperatures. The measured dielectric data were fit to a parametric model using piecewise linear functions, providing a means for readily incorporating these data into computational models. These data represent the first report of changes in broadband dielectric properties of liver tissue at ablative temperatures and should help enable additional studies in ablation system development.

Download or read book Fractional Order Modeling of Dynamic Systems with Applications in Optimization Signal Processing and Control written by Ahmed G. Radwan and published by Academic Press. This book was released on 2021-10-22 with total page 530 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fractional-order Modelling of Dynamic Systems with Applications in Optimization, Signal Processing and Control introduces applications from a design perspective, helping readers plan and design their own applications. The book includes the different techniques employed to design fractional-order systems/devices comprehensively and straightforwardly. Furthermore, mathematics is available in the literature on how to solve fractional-order calculus for system applications. This book introduces the mathematics that has been employed explicitly for fractional-order systems. It will prove an excellent material for students and scholars who want to quickly understand the field of fractional-order systems and contribute to its different domains and applications. Fractional-order systems are believed to play an essential role in our day-to-day activities. Therefore, several researchers around the globe endeavor to work in the different domains of fractional-order systems. The efforts include developing the mathematics to solve fractional-order calculus/systems and to achieve the feasible designs for various applications of fractional-order systems. Presents a simple and comprehensive understanding of the field of fractional-order systems Offers practical knowledge on the design of fractional-order systems for different applications Exposes users to possible new applications for fractional-order systems

Download or read book Multiphysics Design Optimization of Microwave Ablation Antennas written by Shashwat Sharma and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Microwave ablation is based on localized heating of biological tissues, enabled by an electromagnetic field. Antennas for ablation are commonly designed in a forward approach to generate a particular Specific Absorption Rate profile within the target. However, little attention has been dedicated to designing antennas inversely, to allow controllable synthesis of temperature profiles customized for the application. Also, most existing designs do not account for thermal inhomogeneities in tissue. An inverse, multiphysics methodology for microwave ablation antenna design is presented herein, that involves optimizing the antennaâ s current distribution to synthesize a desired temperature profile, while accounting for heat diffusion. The results indicate and quantify the clear advantages of this multiphysics approach. This methodology is successfully applied towards designing an easily configurable printed dipole microwave ablation antenna that addresses several limitations of existing designs. This design provides the functionality of a phased array, and allows controlled synthesis of temperature profiles.

Download or read book Physics of Thermal Therapy written by Eduardo Moros and published by Taylor & Francis. This book was released on 2016-04-19 with total page 375 pages. Available in PDF, EPUB and Kindle. Book excerpt: The field of thermal therapy has been growing tenaciously in the last few decades. The application of heat to living tissues, from mild hyperthermia to high-temperature thermal ablation, has produced a host of well-documented genetic, cellular, and physiological responses that are being researched intensely for medical applications, particularly fo

Download or read book Emerging Electromagnetic Medicine written by Mary E. O'Connor and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 309 pages. Available in PDF, EPUB and Kindle. Book excerpt: Emerging Electromagnetic Medicine presents the latest research findings in the field of electromagnetic radiation. The book discusses the research of current active researchers in terms of synthesizing and sharing their ideas on the use of electromagnetic fields in diagnostic and therapeutic medicine, now and in the future, including the benefits and risks involved. The book consists of three parts prefaced by a brief historic perspective. Section I describes the theoretical concerns and actual mechanisms involved; Section II covers current preclinical studies, performed in vivo and in vitro, concerning the biological action of the electromagnetic radiation; and Section III reports on actual clinical applications of electromagnetic therapy and also the current machinery used to do so.

Download or read book Epicardial Interventions in Electrophysiology An Issue of Cardiac Electrophysiology Clinics written by Kalyanam Shivkumar and published by Elsevier Health Sciences. This book was released on 2010-02-16 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt: Epicardial ablation is a relatively new technique that is less invasive than traditional surgical ablation. It shows promise in certain patient populations. This issue of Cardiac Electrophysiology Clinics is one of the first collections of articles on this cutting edge technique.

Download or read book Antenna and Sensor Technologies in Modern Medical Applications written by Yahya Rahmat-Samii and published by John Wiley & Sons. This book was released on 2021-02-25 with total page 624 pages. Available in PDF, EPUB and Kindle. Book excerpt: A guide to the theory and recent development in the medical use of antenna technology Antenna and Sensor Technologies in Modern Medical Applications offers a comprehensive review of the theoretical background, design, and the latest developments in the application of antenna technology. Written by two experts in the field, the book presents the most recent research in the burgeoning field of wireless medical telemetry and sensing that covers both wearable and implantable antenna and sensor technologies. The authors review the integrated devices that include various types of sensors wired within a wearable garment that can be paired with external devices. The text covers important developments in sensor-integrated clothing that are synonymous with athletic apparel with built-in electronics. Information on implantable devices is also covered. The book explores technologies that utilize both inductive coupling and far field propagation. These include minimally invasive microwave ablation antennas, wireless targeted drug delivery, and much more. This important book: Covers recent developments in wireless medical telemetry Reviews the theory and design of in vitro/in vivo testing Explores emerging technologies in 2D and 3D printing of antenna/sensor fabrication Includes a chapter with an annotated list of the most comprehensive and important references in the field Written for students of engineering and antenna and sensor engineers, Antenna and Sensor Technologies in Modern Medical Applications is an essential guide to understanding human body interaction with antennas and sensors.

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

Download or read book Irreversible Electroporation written by Boris Rubinsky and published by Springer Science & Business Media. This book was released on 2009-11-25 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: Non-thermal irreversible electroporation is a new minimally invasive surgical p- cedure with unique molecular selectivity attributes – in fact it may be considered the first clinical molecular surgery procedure. Non-thermal irreversible electro- ration is a molecular selective mode of cell ablation that employs brief electrical fields to produce nanoscale defects in the cell membrane, which can lead to cell death, without an effect on any of the other tissue molecules. The electrical fields can be produced through contact by insertion of electrode needles around the undesirable tissue and non-invasively by electromagnetic induction. This new - dition to the medical armamentarium requires the active involvement and is of interest to clinical physicians, medical researchers, mechanical engineers, che- cal engineers, electrical engineers, instrumentation designers, medical companies and many other fields and disciplines that were never exposed in their training to irreversible electroporation or to a similar concept. This edited book is designed to be a comprehensive introduction to the field of irreversible electroporation to those that were not exposed or trained in the field before and can also serve as a reference manual. Irreversible electroporation is broad and interdisciplinary. Therefore, we have made an attempt to cover every one of the various aspects of the field from an introductory basic level to state of the art.

Download or read book Radiofrequency Ablation for Small Hepatocellular Carcinoma written by Minshan Chen and published by Springer. This book was released on 2015-11-26 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive guide to the treatment of small hepatocellular carcinoma (sHCC) using a minimally invasive technique: radiofrequency ablation (RFA). RFA has emerged as a new treatment modality and become the main modality of locoregional therapy. Extensive clinical research indicates that RFA is as effective as surgical resection for sHCC, and it has the advantage of being less invasive. However, the outcomes after RFA are largely dependent on the operators’ experience- known as the “learning curve”. This book presents the characteristics of sHCC and discusses why sHCC is the best candidate for RFA. Then it introduces all the commercially available RFA systems, and their working principles, advantages, disadvantages and so on. It goes on to demonstrate how to perform RFA under the guidance of ultrasound, CT, laparoscopy, or during open operation. Finally, it discusses the radiologic assessment and follow‐up after RFA, as well as adjuvant therapies and clinical trials on RFA. The authors are experts from the fields of pathology, radiology, surgery, and gastroenterology, as well as manufacturers. With this book, readers gain have a clear idea of when and how to do RFA. It aims to standardize and generalize the procedure of RFA, which will be very helpful in improving the outcome of RFA for sHCC.

Download or read book Indwelling Neural Implants written by William M. Reichert and published by CRC Press. This book was released on 2007-12-17 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt: Despite enormous advances made in the development of external effector prosthetics over the last quarter century, significant questions remain, especially those concerning signal degradation that occurs with chronically implanted neuroelectrodes. Offering contributions from pioneering researchers in neuroprosthetics and tissue repair, Indwel

Download or read book The SAGES Manual on the Fundamental Use of Surgical Energy FUSE written by Liane Feldman and published by Springer Science & Business Media. This book was released on 2012-03-06 with total page 261 pages. Available in PDF, EPUB and Kindle. Book excerpt: The SAGES Manual on the Fundamental Use of Surgical Energy (FUSE) emphasizes good communication and promotes best practice for the use of electrosurgical, ultrasonic, and microwave energy sources in the operating theatre. This manual describes the basic technology of energy sources in the operating room and demonstrates the correct use and indications of energy sources in clinical practice. It also addresses the potential complications, hazards, and errors in the use of surgical energy sources and evaluates the potential interactions of energy sources with other medical devices. Any healthcare professional who has ever picked up an energy device in the OR such as a “Bovie” , Ultrasonic or bipolar instrument will better understand how it works, when to apply it, and what are the possible hazards and errors in its use. The SAGES Manual on the Fundamental Use of Surgical Energy (FUSE) is the first volume of its kind to provide such guidance and will be of great value to surgeons, anesthesiologists, nurses, endoscopists, and allied health care professionals who use these devices.

Download or read book Clinical Arrhythmology and Electrophysiology written by Ziad F. Issa and published by Elsevier Health Sciences. This book was released on 2009 with total page 519 pages. Available in PDF, EPUB and Kindle. Book excerpt: With its unique, singular focus on the clinical aspect of cardiac arrhythmias, Clinical Arrhythmology and Electrophysiology: A Companion to Braunwald's Heart Disease makes it easy to apply today's most up-to-date guidelines for diagnosis and treatment. An expert author team provides clear, clinically focused guidance on all types of cardiac arrhythmias, including practical techniques for managing complex patients. Find the information you need quickly with a consistent organization in all chapters, written to a template that shows every arrhythmia type in a similar manner. Access the fully searchable contents online at www.expertconsult.com, in addition to downloadable images and dynamic video clips. Fully understand the rationale for treatment of specific arrhythmias with practical techniques that are grounded in the most recent basic science. Stay up to date with new chapters on molecular mechanisms of cardiac electrical activity, cardiac ion channels, ventricular tachycardia in nonischemic dilated cardiomyopathy, epicardial ventricular tachycardia, ventricular arrhythmias in hypertrophic cardiomyopathy, ventricular arrhythmias in inherited channelopathies, ventricular arrhythmias in congenital heart disease, atrial arrhythmias in congenital heart disease, and complications of catheter ablation of cardiac arrhythmias. View videos of 27 key techniques online, including optical mapping of reentrant ventricular arrhythmias, 3-dimensional mapping of arrhythmias using different mapping and navigation modalities, and fluoroscopy images illustrating techniques for electrophysiologic catheter positioning, atrial septal puncture, and pericardial access. Gain a new understanding of hot topics such as mechanisms of arrhythmias, electrophysiologic testing, mapping and navigation modalities, ablation energy sources, sinus node dysfunction, conduction disturbances, atrial tachyarrhythmias, preexcitation syndromes and all types of ventricular and supraventricular tachycardias. Tackle the clinical management of cardiac arrhythmias with confidence with the most up-to-date guidance from the experts you trust. Your purchase entitles you to access the web site until the next edition is published, or until the current edition is no longer offered for sale by Elsevier, whichever occurs first. If the next edition is published less than one year after your purchase, you will be entitled to online access for one year from your date of purchase. Elsevier reserves the right to offer a suitable replacement product (such as a downloadable or CD-ROM-based electronic version) should access to the web site be discontinued.

Download or read book Tumor Ablation written by Eric van Sonnenberg and published by Springer Science & Business Media. This book was released on 2008-09-08 with total page 554 pages. Available in PDF, EPUB and Kindle. Book excerpt: There is an enormous sense of excitement in the communities of cancer research and cancer care as we move into the middle third of the ?rst decade of the 21st century. For the ?rst time,there is a true sense of c- ?dence that the tools provided by the human genome project will enable cancer researchers to crack the code of genomic abnormalities that allow tumor cells to live within the body and provide highly speci?c, virtually non-toxic therapies for the eradication,or at least ?rm control of human cancers. There is also good reason to hope that these same lines of inquiry will yield better tests for screening, early detection, and prev- tion of progression beyond curability. While these developments provide a legitimate basis for much op- mism, many patients will continue to develop cancers and suffer from their debilitating effects, even as research moves ahead. For these in- viduals, it is imperative that the cancer ?eld make the best possible use of the tools available to provide present day cancer patients with the best chances for cure, effective palliation, or, at the very least, relief from symptoms caused by acute intercurrent complications of cancer. A modality that has emerged as a very useful approach to at least some of these goals is tumor ablation by the use of physical or physiochemical approaches.

Download or read book Principles and Technologies for Electromagnetic Energy Based Therapies written by Punit Prakash and published by Academic Press. This book was released on 2021-12-02 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: Principles and Technologies for Electromagnetic Energy Based Therapies covers the theoretical foundations of electromagnetic-energy based therapies, principles for design of practical devices and systems, techniques for in vitro and in vivo testing of devices, and clinical application examples of contemporary therapies employing non-ionizing electromagnetic energy. The book provides in-depth coverage of: pulsed electric fields, radiofrequency heating systems, tumor treating fields, and microwave heating technology. Devices and systems for electrical stimulation of neural and cardiac issue are covered as well. Lastly, the book describes and discusses issues that are relevant to engineers who develop and translate these technologies to clinical applications. Readers can access information on incorporation of preclinical testing, clinical studies and IP protection in this book, along with in-depth technical background for engineers on electromagnetic phenomena within the human body and selected therapies. It covers both engineering and biological/medical materials and gives a full perspective on electromagnetics therapies. Unique features include content on tumor treating fields and the development and translation of biomedical devices. Provides in-depth technical background on electromagnetic energy-based therapies, along with real world examples on how to design devices and systems for delivering electromagnetic energy-based therapies Includes guidance on issues that are relevant for translating the technology to the market, such as intellectual property, regulatory issues, and preclinical testing Companion site includes COMSOL models, MATLAB code, and lab protocols

Download or read book Biomedical Engineering Challenges written by Vincenzo Piemonte and published by John Wiley & Sons. This book was released on 2018-04-23 with total page 273 pages. Available in PDF, EPUB and Kindle. Book excerpt: An important resource that puts the focus on the chemical engineering aspects of biomedical engineering In the past 50 years remarkable achievements have been advanced in the fields of biomedical and chemical engineering. With contributions from leading chemical engineers, Biomedical Engineering Challenges reviews the recent research and discovery that sits at the interface of engineering and biology. The authors explore the principles and practices that are applied to the ever-expanding array of such new areas as gene-therapy delivery, biosensor design, and the development of improved therapeutic compounds, imaging agents, and drug delivery vehicles. Filled with illustrative case studies, this important resource examines such important work as methods of growing human cells and tissues outside the body in order to repair or replace damaged tissues. In addition, the text covers a range of topics including the challenges faced with developing artificial lungs, kidneys, and livers; advances in 3D cell culture systems; and chemical reaction methodologies for biomedical imagining analysis. This vital resource: Covers interdisciplinary research at the interface between chemical engineering, biology, and chemistry Provides a series of valuable case studies describing current themes in biomedical engineering Explores chemical engineering principles such as mass transfer, bioreactor technologies as applied to problems such as cell culture, tissue engineering, and biomedical imaging Written from the point of view of chemical engineers, this authoritative guide offers a broad-ranging but concise overview of research at the interface of chemical engineering and biology.

Download or read book Computational Modeling in Biomedical Engineering and Medical Physics written by Alexandru Morega and published by Academic Press. This book was released on 2020-09-15 with total page 321 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mathematical and numerical modelling of engineering problems in medicine is aimed at unveiling and understanding multidisciplinary interactions and processes and providing insights useful to clinical care and technology advances for better medical equipment and systems. When modelling medical problems, the engineer is confronted with multidisciplinary problems of electromagnetism, heat and mass transfer, and structural mechanics with, possibly, different time and space scales, which may raise concerns in formulating consistent, solvable mathematical models. Computational Medical Engineering presents a number of engineering for medicine problems that may be encountered in medical physics, procedures, diagnosis and monitoring techniques, including electrical activity of the heart, hemodynamic activity monitoring, magnetic drug targeting, bioheat models and thermography, RF and microwave hyperthermia, ablation, EMF dosimetry, and bioimpedance methods. The authors discuss the core approach methodology to pose and solve different problems of medical engineering, including essentials of mathematical modelling (e.g., criteria for well-posed problems); physics scaling (homogenization techniques); Constructal Law criteria in morphing shape and structure of systems with internal flows; computational domain construction (CAD and, or reconstruction techniques based on medical images); numerical modelling issues, and validation techniques used to ascertain numerical simulation results. In addition, new ideas and venues to investigate and understand finer scale models and merge them into continuous media medical physics are provided as case studies. Presents the fundamentals of mathematical and numerical modeling of engineering problems in medicine Discusses many of the most common modelling scenarios for Biomedical Engineering, including, electrical activity of the heart hemodynamic activity monitoring, magnetic drug targeting, bioheat models and thermography, RF and microwave hyperthermia, ablation, EMF dosimetry, and bioimpedance methods Includes discussion of the core approach methodology to pose and solve different problems of medical engineering, including essentials of mathematical modelling, physics scaling, Constructal Law criteria in morphing shape and structure of systems with internal flows, computational domain construction, numerical modelling issues, and validation techniques used to ascertain numerical simulation results