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Electrical impedance tomography (EIT) is a technique employed in tactile sensing to create an image of impedance changes within a continuous sensor using electrodes placed only at the perimeter. This is advantageous for soft sensing 'e-skins' being developed for applications such as robotics and human-machine interactions. EIT was originally developed for medical diagnostics and has more recently been adopted for tactile imaging, which has distinct requirements and challenges. This book explains the fundamentals of EIT at a basic level, without requiring a high level of mathematical expertise, making it an accessible text for students and newcomers to the field. It also covers applications and challenges of the method, recent developments, and practical implications. Part of IOP Series in Sensors and Sensor Systems.

Detectors. --- Electrical impedance tomography. --- Instruments & instrumentation engineering. --- TECHNOLOGY & ENGINEERING / Sensors.

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Assessing the state of chronic open wounds and monitoring their healing in the long term is an important but delicate task in the medical world. Manipulating and perturbing traumatized tissues too often hinders the healing process and prolongs the burden for the patient and the medical system. Conversely, ignoring complications such as bacterial infection or necrotic tissue for too long can lead to dramatic consequences, from the need for amputation to septic shock and death.
Nowadays, chronic wound monitoring is still a matter of frequent visual inspections, which requires medical expertise and intrusions into the daily lives of patients.

The Vitapatch research project, for which this thesis has been carried out, aims at solving this issue by creating easily deployable smart sensor patches capable of long-term continuous monitoring of a chronic wound in a non-invasive manner.

This thesis explores the use of bioimpedance spectroscopy to assess the state of human skin, and electrical impedance tomography as an image reconstruction tool to provide a non-intrusive visual assessment of wound healing.
After briefly reminding the concepts of electrical impedance and conduction of electricity, the physiological and electrical properties of human skin and tissues are presented, and the impacts of a wound on these properties are discussed. Then, the methodology for bioimpedance measurements is explained, with specific care toward long-term medical applications. Following, the prototype bioimpedance spectroscopy circuit created by Microsys is analyzed and simulated. After that, the required signal processing steps to make this circuit work are presented, and the journey towards experimental validation of the processing routine is described. Proceeding, electrical impedance tomography is introduced, different algorithms are assessed through simulations and a preliminary application is presented. Adaptations of the EIT problem to wound imaging are performed, and image reconstruction on a finite-element model of wounded skin is simulated. Finally, an experimental setup for wound assessment on phantom skin is presented. Repeated hardware delays and unfinished or faulty components have prevented the completion of real-life experiments, but simulations show promising prospects for a nontraditional approach to impedance spectroscopy and signal processing, as well as for skin modeling and applications of electrical impedance tomography to non-invasive wound imaging.

Wound monitoring --- Skin impedance measurements --- Electrical impedance tomography --- Impedance spectrum signal processing --- Ingénierie, informatique & technologie > Ingénierie électrique & électronique --- Sciences de la santé humaine > Médecine de laboratoire & technologie médicale

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This book mainly deals with recent advances in biomedical sensing and imaging. More recently, wearable/smart biosensors and devices, which facilitate diagnostics in a non-clinical setting, have become a hot topic. Combined with machine learning and artificial intelligence, they could revolutionize the biomedical diagnostic field. The aim of this book is to provide a research forum in biomedical sensing and imaging and extend the scientific frontier of this very important and significant biomedical endeavor.

Technology: general issues --- finite element method --- thin shell model --- β dispersion --- Maxwell–Wagner effect --- bio-impedance spectroscopy --- multisensory --- electromyography --- pattern recognition --- rehabilitation --- blood coagulation --- image sensing --- image classification --- electrical impedance tomography --- frequency difference --- time difference --- lung imaging --- electromagnetic detection and biosensors --- electromagnetic biological theory --- biomedical application --- frequency --- machine learning

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This volume gives an introduction to a fascinating research area to applied mathematicians. It is devoted to providing the exposition of promising analytical and numerical techniques for solving challenging biomedical imaging problems, which trigger the investigation of interesting issues in various branches of mathematics.

Biomedical engineering --- Electrical impedance tomography --- Imaging systems in medicine --- Diagnostic Imaging --- Tomography --- Electronics, Medical --- Models, Theoretical --- Electric Impedance --- Diagnostic Techniques and Procedures --- Investigative Techniques --- Electric Conductivity --- Electronics --- Electricity --- Physics --- Analytical, Diagnostic and Therapeutic Techniques and Equipment --- Diagnosis --- Electromagnetic Phenomena --- Natural Science Disciplines --- Physical Phenomena --- Disciplines and Occupations --- Phenomena and Processes --- Biology - General --- Biomedical Engineering --- Health & Biological Sciences --- Biology --- Mathematical models --- Electrical impedance tomography. --- Mathematical models. --- Applied potential tomography --- Electrical impedance imaging --- Clinical engineering --- Medical engineering --- Mathematics. --- Radiology. --- Differential equations. --- Partial differential equations. --- Potential theory (Mathematics). --- Biomathematics. --- Mathematical and Computational Biology. --- Potential Theory. --- Ordinary Differential Equations. --- Partial Differential Equations. --- Imaging / Radiology. --- Mathematics --- Green's operators --- Green's theorem --- Potential functions (Mathematics) --- Potential, Theory of --- Mathematical analysis --- Mechanics --- Partial differential equations --- 517.91 Differential equations --- Differential equations --- Radiological physics --- Radiation --- Math --- Science --- Bioengineering --- Biophysics --- Engineering --- Medicine --- Differential Equations. --- Differential equations, partial. --- Radiology, Medical. --- Clinical radiology --- Radiology, Medical --- Radiology (Medicine) --- Medical physics

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These proceedings continue the series edited in the framework of the traditional triennial International Conference on Electrical Bio-Impedance (ICEBI), the most important platform for presenting recent scientific achievements in the area of electrical bio-impedance. The XIII ICEBI was held from Aug. 29th – Sept. 02nd 2007 at the Graz University of Technology in Graz, Austria. As already in previous years the 13th ICEBI was held together with the 8th Conference on Electrical Impedance Tomography, the annual meeting for biomedical impedance imaging. Consequently, the proceedings also contain many contributions from this very important and challenging branch of bioimpedance research. When compared to previous ICEBIs we notice a slight reduction of publications dedicated to purely theoretical models of bioimpedance phenomena while there was a significant increase of presentations on non-contacting and multimodal imaging technologies, cellular applications and specific biomedical applications. Among the latter pulmonary monitoring, multi-segmental BIA and cellular applications should be especially mentioned as obviously being in the transition from basic research to clinical usefulness. The growth of interest for bioimpedance research is also reflected by two additional facts, namely the foundation of the International Society for Electrical Bio-Impedance (ISEBI) at the preceding conference 2004 in Gdansk and the kind endorsement of the 13th ICEBI by the IFMBE and its offer to publish scientific papers in the series of IFMBE proceedings. Seeing all these favourable developments the editorial board is more than optimistic that bio-impedance research will continue its successful way and further contribute to the overall prosperity of biomedical engineering.

Impedance, Bioelectric --- Electrical impedance tomography --- Applied potential tomography --- Electrical impedance imaging --- Tomography --- Bioelectric impedance --- Bioelectrical impedance --- Electrophysiology --- Impedance (Electricity) --- Radiology, Medical. --- Biomedical engineering. --- Medicine. --- Microwaves. --- Cytology. --- Imaging / Radiology. --- Biomedical Engineering and Bioengineering. --- Molecular Medicine. --- Microwaves, RF and Optical Engineering. --- Cell Biology. --- Cell biology --- Cellular biology --- Biology --- Cells --- Cytologists --- Hertzian waves --- Electric waves --- Electromagnetic waves --- Geomagnetic micropulsations --- Radio waves --- Shortwave radio --- Clinical sciences --- Medical profession --- Human biology --- Life sciences --- Medical sciences --- Pathology --- Physicians --- Clinical engineering --- Medical engineering --- Bioengineering --- Biophysics --- Engineering --- Medicine --- Clinical radiology --- Radiology, Medical --- Radiology (Medicine) --- Medical physics --- Radiology. --- Molecular biology. --- Optical engineering. --- Cell biology. --- Mechanical engineering --- Molecular biochemistry --- Molecular biophysics --- Biochemistry --- Biomolecules --- Systems biology --- Radiological physics --- Physics --- Radiation