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Rozprawy doktorskie na temat „Impedance reconstruction”

Autor: Grafiati

Data publikacji: 2 czerwca 2025

Data aktualizacji: 31 lipca 2025

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1

Breckon, W. R. "Image reconstruction in Electrical Impedance Tomography." Thesis, Oxford Brookes University, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.292254.

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Tang, Mengxing. "Image reconstruction in electrical impedance mammography." Thesis, De Montfort University, 2003. http://hdl.handle.net/2086/6260.

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Breast cancer continues to be a leading cause of death in Western countries. One of the most important approaches to reduce this mortality is to detect the cancer as early as possible. Although current diagnostic imaging modalities are able to give useful information for diagnosis, development of new imaging technique is highly desirable in order to detect breast cancer in an earlier stage. This is the motive of the present study of Electrical Impedance Mammography (ElM), which applies Electrical Impedance Tomography (EIT) to image human breasts. The overall aim of the whole project is to deve

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Scrivanti, Gabriele Luca Giovanni. "Nonsmooth Nonconvex Variational Reconstruction for Electrical Impedance Tomography." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amslaurea.unibo.it/20700/.

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Electrical Impedance Tomography is an imaging technique that aims to reconstruct the inner conductivity distribution of a medium starting from a set of measured voltages registered by a series of electrodes that are positioned on the surface of the medium. Such technique was used for the first time in geological studies in 1930 and then applied to industrial procedures. The first clinical use of EIT dates back to 1987. In 2018 EIT was validated in tissue engineering as a noninvasive and label-free imaging and monitoring tool for cell distribution (cell growth, differentiation and tissue forma

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Artola, Jose. "A study on electrical impedance tomography reconstruction algorithms." Thesis, University of York, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.241077.

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5

Kalisse, Camille George Emile. "Reconstruction algorithms for the Aberdeen impedance imaging systems." Thesis, University of Aberdeen, 1993. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU055336.

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The backprojection method for electrical impedance image reconstruction has been adapted for the opposing current drive configuration implemented in the second generation of Aberdeen impedance imaging systems. The logarithmic conformal transformation is used to solve the Forward problem for a two-dimensional homogeneous medium of circular cross-section. Pixel weights of backprojection are calculated from the normalised distances of the pixel centres from the boundary side of backprojection. An experimental solution to the Forward problem is a homogeneous medium of irregular cross-section and t

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6

Kotre, Colin John. "Studies of image reconstruction methods for electrical impedance tomography." Thesis, University of Newcastle Upon Tyne, 1993. http://hdl.handle.net/10443/362.

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Electrical impedance tomography (EIT) is a technique in which images representing the cross-sectional distribution of electrical impedance within a threedimensional object are reconstructed from measurements on the object surface. In this work, some developments of image reconstruction algorithms aimed at increasing the value of this technique in the field of medical diagnosis are studied. The electrical properties of biological tissue and the possibilities for medical applications of EIT are first reviewed. The physical and mathematical basis for EIT is then. examined with particular regard f

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7

Bouallouche, Amar. "Development of novel reconstruction algorithms for induced current impedance imaging." Thesis, University of Sheffield, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.387636.

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8

Zadehkoochak, Mohsen. "Image reconstruction and spectral expansion analysis in electrical impedance tomography." Thesis, University of Southampton, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.385528.

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9

Meeson, Stuart. "An investigation of optimal performance criteria in electrical impedance tomography." Thesis, University of Southampton, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.389013.

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Perez-Juste, Abascal Juan Felipe. "Improvements in reconstruction algorithms for electrical impedance tomography of brain function." Thesis, University College London (University of London), 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.444541.

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11

Liu, Hongze. "A High-Resolution Microscopic Electrical Impedance Imaging Modality: Scanning Impedance Imaging." Diss., CLICK HERE for online access, 2007. http://contentdm.lib.byu.edu/ETD/image/etd1729.pdf.

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12

Woo, Hok Wai. "Development of a new reconstruction algorithm and an electrical impedance tomography system /." Thesis, Connect to this title online; UW restricted, 1990. http://hdl.handle.net/1773/5866.

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13

Boyacioglu, Rasim. "Performance Evaluation Of Current Density Based Magnetic Resonance Electrical Impedance Tomography Reconstruction Algorithms." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/12611016/index.pdf.

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Magnetic Resonance Electrical Impedance Tomography (MREIT) reconstructs conductivity distribution with internal current density (MRCDI) and boundary voltage measurements. There are many algorithms proposed for the solution of MREIT inverse problem which can be divided into two groups: Current density (J) and magnetic flux density (B) based reconstruction algorithms. In this thesis, J-based MREIT reconstruction algorithms are implemented and optimized with modifications. These algorithms are simulated with five conductivity models which have different geometries and conductivity values. Results

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14

Ireland, Robert Henry. "Anatomically constrained image reconstruction applied to emission computed tomography & magnetic impedance tomography." Thesis, University of Sheffield, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.269337.

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15

Soleimani, Manuchehr. "Image and shape reconstruction methods in magnetic induction tomography and electrical impedance tomography." Thesis, University of Manchester, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.512290.

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16

Eker, Gokhan. "Performance Evaluation Of Magnetic Flux Density Based Magnetic Resonance Electrical Impedance Tomography Reconstruction Algorithms." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/12610940/index.pdf.

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Magnetic Resonance Electrical Impedance Tomography (MREIT) reconstructs images of electrical conductivity distribution based on magnetic flux density (B) measurements. Magnetic flux density is generated by an externally applied current on the object and measured by a Magnetic Resonance Imaging (MRI) scanner. With the measured data and peripheral voltage measurements, the conductivity distribution of the object can be reconstructed. There are two types of reconstruction algorithms. First type uses current density distributions to reconstruct conductivity distribution. Object must be rotated in

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17

Abadi, Hamid Dehghani Mohammad. "Finite element modelling and image reconstruction in single and multi-frequency electrical impedance tomography." Thesis, Sheffield Hallam University, 1998. http://shura.shu.ac.uk/19182/.

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Electrical impedance tomography (EIT) is an imaging technique that aims to reconstruct the internal conductivity distribution of a body, based on the electrical measurements taken on its periphery. While relatively new it has received attention as a possible new medical imaging technique which offers non-hazardous applications and low-cost instrumentation. To understand the full potential of this new mode of imaging, a numerical modelling method has been used in order to investigate the behaviour of an EIT system. Using this mode of analysis, it is possible to simulate many experiments that ot

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18

Pengpan, Thanyawee. "A combination of motion-compensated cone-beam computed tomography image reconstruction and electrical impedance tomography." Thesis, University of Bath, 2012. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.558873.

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Cone-beam computed tomography (CBCT) is an imaging technique used in conjunction with radiation therapy. CBCT is used to verify the position of tumours just prior to radiation treatment session. The accuracy of the radiation treatment of thoracic and upper abdominal tumours is heavily affected by respiratory movement. Blurring artefacts, due to the movement during a CBCT scanning, cause misregistration between the CBCT image and the planning image. There has been growing interest in the use of motion-compensated CBCT for correcting the breathing-induced artefacts. A wide range of iterative rec

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19

Gadd, Richard. "Development of a reconstruction algorithm for electrical impedance tomography and its extension to the third dimension." Thesis, Keele University, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.357117.

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20

Deba, Charlie Nindjou. "Evaluation and verification of five different image reconstruction algorithms for electrical resistance tomography applications." Thesis, Cape Peninsula University of Technology, 2016. http://hdl.handle.net/20.500.11838/2465.

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Thesis (MTech (Electrical Engineering))--Cape Peninsula University of Technology, 2016.<br>Tomography is the ability to internally visualise an opaque medium or a body, using different imaging techniques. Electrical Resistance Tomography (ERT) technique is a method commonly used in process tomography. It uses a non-intrusive resistance measurement between a set of electrodes attached on the circumference of a fixed cross-section with a given conductivity and permittivity distribution. ERT appears to be simple, low cost, safe and non-invasive. Despite the advantages of ERT, the reconstruction o

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21

Dupre, Antoine. "Electrical impedance tomography for void fraction measurements of harsh two-phase flows : prototype development and reconstruction techniques." Thesis, Ecole centrale de Marseille, 2017. http://www.theses.fr/2017ECDM0005/document.

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Les récentes avancées technologiques des matériels d’acquisition de données ont permis de réduire le temps d’acquisition d’image en tomographie électrique, ce qui offre des opportunités pour l’étude des écoulements diphasiques transitoires. Parmi les nombreux atouts de cette technique d’imagerie d’écoulements diphasiques, on peut citer son caractère non-intrusif, sa haute fréquence d’acquisition et son faible coût. Un ensemble d’électrodes placées sur le pourtour d’une conduite servent à transmettre une excitation électrique au milieu et à le sonder. Ainsi, la distribution des phases perturbe

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22

Gong, Bo [Verfasser], and Ullrich [Akademischer Betreuer] Müller-Lisse. "Electrical impedance tomography image reconstruction with structural and multi-scale priors / Bo Gong ; Betreuer: Ullrich Müller-Lisse." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2018. http://d-nb.info/1174142715/34.

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Martin, Lorca Dario. "Implementation And Comparison Of Reconstruction Algorithms For Magnetic Resonance." Master's thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/12608250/index.pdf.

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In magnetic resonance electrical impedance tomography (MR-EIT), crosssectional images of a conductivity distribution are reconstructed. When current is injected to a conductor, it generates a magnetic field, which can be measured by a magnetic resonance imaging (MRI) scanner. MR-EIT reconstruction algorithms can be grouped into two: current density based reconstruction algorithms (Type-I) and magnetic flux density based reconstruction algorithms (Type-II). The aim of this study is to implement a series of reconstruction algorithms for MR-EIT, proposed by several research groups, and compare th

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24

Degirmenci, Evren. "High Resolution Imaging Of Anisotropic Conductivity With Magnetic Resonance Electrical Impedance Tomography (mr-eit)." Phd thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/3/12611982/index.pdf.

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Electrical conductivity of biological tissues is a distinctive property which differs among tissues. It also varies according to the physiological and pathological state of tissues. Furthermore, in order to solve the bioelectric field problems accurately, electrical conductivity information is essential. Magnetic Resonance Electrical Impedance Tomography (MREIT) technique is proposed to image this information with high spatial resolution. However, almost all MREIT algorithms proposed to date assumes isotropic conductivity in order to simplify the underlying mathematics. But it is known that mo

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25

Horesh, Lior. "Some novel approaches in modelling and image reconstruction for multi-frequency Electrical Impedance Tomography of the human brain." Thesis, University College London (University of London), 2006. http://discovery.ucl.ac.uk/1444744/.

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Electrical Impedance Tomography (EIT) is a recently developed imaging technique. Small insensible currents are injected into the body using electrodes. Measured voltages are used for reconstruction of images of the internal dielectric properties of the body. This imaging technique is portable, safe, rapid, inexpensive and has the potential to provide a new method for imaging in remote or acute situations, where other large scanners, such as MRI, are either impractical or unavailable. It has been in use in clinical research for about two decades but has not yet been adopted into routine clinica

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26

Topal, Tankut. "A Labview Interface To Integrate Magnetic Resonance Imaging (mri) Simulator With System Control And Its Application To Regional Magnetic Resonance Electrical Impedance Tomography (mreit) Reconstruction." Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12612246/index.pdf.

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Magnetic resonance imaging (MRI) is a high resolution medical imaging technique based on distinguishing tissues according to their nuclear magnetic properties. Magnetic resonance electrical impedance tomography (MREIT) is a conductivity imaging technique which reconstructs images of electrical properties, based on their effect on induced magnetic flux density due to externally applied current flow. Both of these techniques are of interest for novel research and development. Simulators help researchers observe the accuracy and the results of the study. In this study a user friendly complete MR

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27

Douasbin, Quentin. "Acoustic waves in combustion devices : interactions with flames and boundary conditions." Phd thesis, Toulouse, INPT, 2018. http://oatao.univ-toulouse.fr/20204/7/douasbin_quentin.pdf.

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Combustion devices are prone to combustion instabilities. They arise from a constructive coupling between the unsteady heat release rate of the flame and the resonant acoustic modes of the entire system. The occurence of such instabilities can pose a threat to both performance and integrity of combustion systems. Although these phenomena have been known for more than a century, avoiding their appearance in industrial engines is still challenging. The objective of this thesis is threefold: (1) study the dynamics of the resonant acoustic modes, (2) investigate the flame response of a liquid rock

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28

Fránková, Hana. "Ověření technologie BioSealing metodou EIS." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2017. http://www.nusl.cz/ntk/nusl-265705.

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Diploma thesis is dealing with recognition of Biosealing technology using electrical impedance spektrometry method. BioSealing is an innovative method of soil body reconstruction, which uses stimulation of soil bacterial activity to seal the leakage. The method was developed in the Netherlands and it was used in conditions of the Czech Republic in years 2015 and 2016 on the Hornice water work. This earth dam was monitored by electrical impedance spectrometry by apparatus with device Z-meter IV in this period and the data are processed and assessed in this diploma thesis.

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Kořínková, Ksenia. "Vylepšení metodiky rekonstrukce biomedicínských obrazů založené na impedanční tomografii." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2016. http://www.nusl.cz/ntk/nusl-256564.

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Disertační práce, jež má teoretický charakter, je zaměřena na vylepšení a výzkum algoritmů pro zobrazování vnitřní struktury vodivých objektů, hlavně biologických tkání a orgánů pomocí elektrické impedanční tomografie (EIT). V práci je formulován teoretický rámec EIT. Dále jsou prezentovány a porovnány algoritmy pro řešení inverzní úlohy, které zajišťují efektivní rekonstrukci prostorového rozložení elektrických vlastností ve zkoumaném objektu a jejích zobrazení. Hlavní myšlenka vylepšeného algoritmu, který je založen na deterministickém přístupu, spočívá v zavedení dodatečných technik: level

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Kříž, Tomáš. "Nové typy a principy optimalizace digitálního zpracování obrazů v EIT." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2016. http://www.nusl.cz/ntk/nusl-234654.

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This doctoral thesis proposes a new algorithm for the reconstruction of impedance images in monitored objects. The algorithm eliminates the spatial resolution problems present in existing reconstruction methods, and, with respect to the monitored objects, it exploits both the partial knowledge of configuration and the material composition. The discussed novel method is designed to recognize certain significant fields of interest, such as material defects or blood clots and tumors in biological images. The actual reconstruction process comprises two phases; while the former stage is focused on

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31

Yorkey, Thomas J. "Comparing reconstruction methods for electrical impedance tomography." 1986. http://catalog.hathitrust.org/api/volumes/oclc/15051600.html.

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Chiu, Fu-chia, and 丘馥嘉. "Digital Signal Processor-Based Electrical Impedance Image Reconstruction." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/96758463583504303177.

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碩士<br>國立成功大學<br>醫學工程研究所碩博士班<br>95<br>Electrical impedance tomography has the advantages of non-invasiveness, low cost, long-term use, and no radiation hazard. It attracts lots of attentions and is widely applied in the industry and medicine. Currently, there are many image reconstruction methods proposed and developed for EIT. Nevertheless, some of these methods may produce good image resolution, but may take long computation time. Some methods may be fast in image reconstruction, but may produce bad image quality. Therefore, the purpose of this study is to develop a stand alone image reconstr

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Chiang, Yi-ping, and 蔣益賓. "Electrical Impedance Image Reconstruction Using the Distributed Computing Approach." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/32696162744409398000.

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碩士<br>國立成功大學<br>醫學工程學系<br>86<br>In this thesis, the image reconstruction for the electrical impedance tomography (EIT) is implemented using the distributed computing model based on the Winsock. It allows the standard TCP/IP-based applications to be written for the Microsoft Windows environment. The distributed computing model is built on a cluster of local area networking PCs. It is also integrated into our EIT system. The distributed computing model consists of two parts: the client interf

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Woo, Eung Je. "Finite element method and reconstruction algorithms in electrical impedance tomography." 1990. http://catalog.hathitrust.org/api/volumes/oclc/23151724.html.

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潘聰達. "Survey on some reconstruction algorithms for the electrical impedance tomography." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/26831739361417793969.

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Tung, Hann-Sheng, and 童翰昇. "Comparisons of the Reconstruction Algorithms for the Electrical Impedance Imaging." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/82987134301261944500.

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碩士<br>國立成功大學<br>醫學工程學系<br>84<br>In this thesis, the methods of filtered backprojection and l network for electrical impedance image reconstruction aretigated. Both methods have the advantages of fast speed andicity. They have the potential in parallel implementation. Inion, a PC-based electrical impedance imaging system is alsooped. All the procedures such as data acquisition, systemration, and image reconstruction are integrated in a user-dly GUI software system under

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WU, YUAN-DING, and 吳元丁. "Image reconstruction based on the electrical impedance tomography by the application of Newton-Raphson method." Thesis, 1990. http://ndltd.ncl.edu.tw/handle/14438850443007132137.

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Bera, Tushar Kanti. "Studies on Multifrequensy Multifunction Electrical Impedance Tomography (MfMf-EIT) to Improve Bio-Impedance Imaging." Thesis, 2013. http://etd.iisc.ac.in/handle/2005/3365.

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Electrical Impedance Tomography (EIT) is a non linear inverse problem in which the electrical conductivity or resistivity distribution across a closed domain of interest is reconstructed from the surface potentials measured at the domain boundary by injecting a constant sinusoidal current through an array of surface electrodes. Being a non-invasive, non-radiating, non-ionizing, portable and inexpensive methodology, EIT has been extensively studied in medical diagnosis, biomedical engineering, biotechnology, chemical engineering, industrial and process engineering, civil and material engineerin

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Bera, Tushar Kanti. "Studies on Multifrequensy Multifunction Electrical Impedance Tomography (MfMf-EIT) to Improve Bio-Impedance Imaging." Thesis, 2013. http://etd.iisc.ernet.in/2005/3365.

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Electrical Impedance Tomography (EIT) is a non linear inverse problem in which the electrical conductivity or resistivity distribution across a closed domain of interest is reconstructed from the surface potentials measured at the domain boundary by injecting a constant sinusoidal current through an array of surface electrodes. Being a non-invasive, non-radiating, non-ionizing, portable and inexpensive methodology, EIT has been extensively studied in medical diagnosis, biomedical engineering, biotechnology, chemical engineering, industrial and process engineering, civil and material engineerin

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