Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 51 for “"Electrical Impedance Tomography"”.
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Electrical impedance tomography for internal radiation therapy
… radiation therapy based on the principle of electrical impedance tomography (EIT). A novel procedure utilizing brachytherapy needles as electrodes is proposed to map the internal electrical conductivity of the tissue. Since cancerous tissue exhibits different levels of conductivity than …
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An approximation method for electrical impedance tomography
Electrical impedance tomography is an imaging method with applications to geophysics and medical imaging. A new approximation is presented based on Nachman's 2-dimensional construction for closed domains. It improves upon existing approximations by extending the range of application from resolving …
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High fidelity imaging in electrical impedance tomography
… the computational reconstruction of images using Electrical Impedance Tomography (EIT). EIT is an imaging method, in which electrical currents are injected through electrodes into a conducting volume and the resulting potential distribution is measured at surface electrodes. From these potentials, …
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Three dimensional modelling of Electrical Impedance Tomography
Electrical Impedance Tomography (ElT) is an emerging imaging technique with applications in the medical field and in the field of industrial process tomography (lPT). Untilrecently, data acquisition and image reconstruction schemes have been constructed with the assumption that the object being …
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Discrete mathematical models for electrical impedance tomography
Electrical Impedance Tomography (EIT) is a non-invasive, portable and low-cost medical imaging technique. Different current patterns are injected to the surface of a conductive body and the corresponding voltages are measured also on the boundary. These mea-surements are the data used to infer the …
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Parallel algorithms for three dimensional electrical impedance tomography
This thesis is concerned with Electrical Impedance Tomography (EIT), an imaging technique in which pictures of the electrical impedance within a volume are formed from current and voltage measurements made on the surface of the volume. The focus of the thesis is the mathematical and numerical …
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Electrical Impedance Tomography in 3D: Characterization and Evaluation
Electrical Impedance Tomography (EIT) uses body surface electrical stimulation and measurements to create images of the conductivity of contrasting fluids. 3D EIT has a strong potential to image regional inhomogeneities in the lungs. This thesis seeks to characterize 3D measurement patterns, …
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Electrical Impedance Tomography for Perfusion Imaging and Monitoring
Electrical impedance tomography (EIT) is a medical imaging technology that uses boundary electrodes to inject stimulus currents and measure the resulting potential distributions. These potentials are measured using electrodes which are in turn used to reconstruct conductivity changes within the …
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Statistical Preconditioning and Quantitative Imaging for Electrical Impedance Tomography
… iterative scheme to solve the inverse problem of electrical impedance tomography (EIT), an ill-posed and nonlinear inverse problem in which we look to approximate the admittivity distribution inside a body given a discrete set of current and voltage measurements taken at the boundary. The …
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Rot detection in wooden poles using electrical impedance tomography
… that was chosen for this project was that of electrical impedance tomography in which an image of the permittivity in a cross section would be created from impedance measurements made between electrodes attached to the boundary of the pole.
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The Investigation and Implementation of electrical Impedance Tomography Hardware System
Electrical impedance tomography (EIT) is a medical imaging technology that provides a tomographic representation of the distribution of electrical impedance within the body. As the electrical impedance varies for different body tissues, it is possible to characterize tissues from the images and to …
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Monitoring an industrial hydrocyclone using frequency domain multiplexing electrical impedance tomography
This thesis describes the implementation of an Electrical Impedance Tomography (EIT) system using Frequency Domain Multiplexing (FDtvf) to monitor an industrial hydrocyclone. In order to utilise resources more effectively, to reduce negative environmental impact, to satisfy demands and legislations …
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Electrical Impedance Tomography/Spectroscopy (EITS): a Code Division Multiplexed (CDM) approach
Electrical Impedance Tomography and Spectroscopy (EITS) is a noninvasive imaging technique that creates images of cross-sections "tomos" of objects by discriminating them based on their electrical impedance. This thesis investigated and successfully confirmed the use of Code Division Multiplexing …
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Custom Electrical Impedance Tomography Forward Models for Muscle Rehabilitation and Radiation Monitoring
Electrical impedance tomography (EIT) has become increasingly prevalent in medical research. However, there are gaps where EIT has the ability to provide more context and introduce new insights into internal body composition. For example, physical rehabilitation is traditionally based on motion …
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Design and development of a distributed planar pressure sensor utilising electrical impedance tomography.
… describes an investigation into the use of electrical impedance tomography used in conjunction with a flexible conductive sensor for the measurement of distributed pressure. The main application areas are for the constant monitoring of the pressure distribution between a patient and their …
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Absolute electrical impedance tomography and spectroscopy: an Orthogonal Chirp Division Multiplexed (OCDM) approach
Absolute Electrical Impedance Tomography and Spectroscopy (aEITS) is a non-intrusive imaging technique, that reconstructs images based on estimates of the absolute internal impedance distribution of an object. However, without the availability of a reference frame, it suffers from poor image …
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Finite element modelling and image reconstruction in single and multi-frequency electrical impedance tomography.
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 …
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Electrical Impedance Tomography in Nerve Cuffs: Towards an Intuitive Control Interface for Neural-Prosthetics
Electrical impedance tomography (EIT) is an imaging modality which is sensitive to neural activity and can resolve multiple concurrent changes in impedance in a sample, two attributes which make it a promising candidate for investigation in peripheral nerve interface applications. In nerve cuffs …
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