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 109 for “"EIT"”.
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Electrical Impedance Tomography (EIT): The Establishment of a Dual Current Stimulation EIT System for Improved Image Quality
Electrical Impedance Tomography (EIT) is a noninvasive imaging technique that reproduces images of cross-sections, based on the internal impedance distribution of an object. This Dissertation investigates and confirms the use of a dual current stimulation EIT (DCS EIT) system. The results of this …
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Investigation of sine-wave inputs for an FDM EIT system
… (FDM) electrical impedance tomography (EIT) system. This thesis was commissioned by Prof. J. Tapson, on the 1 st of November 200 1. The goals were as follows: 1. Investigate the research done on this project by previous researchers. 2. Investigate the current applications in which …
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Creating Novel Interactions with EIT-Based Devices through a Mobile Enabled API
… input. Electrical Impedance Tomography (EIT) devices measure electrical conductivity and impedance of a part of the body using noninvasive surface electrodes, e.g., a wristband, and form a tomography image of that part, which can be used to measure internal muscular changes. In this way, …
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Multi-electrode stimulation and measurement patterns versus prior information of fast 3D EIT
… Impedance Tomography or as referred to as EIT, is a typical inverse problem of estimating the unknown interior material impedance properties inside a conductive medium through measurements performed at the periphery of the containing medium. Due to its inverse nature, EIT’s poor spatial …
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8-Port Homodyne Detection of EIT-enhanced Cross-phase Modulation Using Broadband Signal Pulses
… electromagnetically-induced transparency (EIT) and which was promised to yield 'giant' optical nonlinearities sufficient for all-optical quantum information processing. Using a cloud of laser-cooled 85Rb atoms as the nonlinear medium, I present the first ever experimental study of …
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Consumers’ accuracy in estimating energy content of common foods in New Zealand (EIT Food Energy Survey)
Obesity is a serious chronic disease that currently affects 31.3% of adult New Zealanders. Obesity is the result of taking in more food energy than needed, and given the risks that arise from obesity, it is important to understand and investigate the multiple factors that contribute to obesity, …
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A direct D-bar reconstruction algorithm for complex admittivities in W2,∞(Ω) for the 2-D EIT problem
Electrical Impedance Tomography (EIT) is a fairly new, portable, relatively inexpensive, imaging system that requires no ionizing radiation. Electrodes are placed at the surface of a body and low frequency, low amplitude current is applied on the electrodes, and the resulting voltage value on each …
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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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Experimentelle und klinische Untersuchung der elektrischen Impedanztomographie zur regionalen Lungenfunktionsprüfung beatmeter Patienten
… die Entstehung von Atelektasen zu verhindern, bereits vorhandene Atelektasen wieder zu eröffnen und eine Lungenüberdehnung zu vermeiden. Eine strahlungsfreie Methode ist wünschenswert, um diese Veränderungen des Lungenversagens kontinuierliche, bettseitig zu überwachen. Die elektrische …
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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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Progettazione di un device di imaging tomografico, basato su principio impedenziometrico, per la valutazione di cicli cardio-respiratori in atleti
Electrical impedance tomography (EIT) is an imaging modality wherein the spatial map of conductivity and permittivity inside a medium is obtained from a set of surface electrical measurements. Electrodes are brought into contact with the surface of the object being imaged and a set of currents are …
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Optical imaging of Rydberg atoms
… electromagnetically induced transparency (EIT) in Rydberg atoms in order to observe optical nonlinearities at the single photon level. ⁸⁷Rb atoms are trapped and cooled using a magneto-optical trap (MOT) and a far off resonance dipole trap (FORT). Once the system is prepared, a ladder EIT …
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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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Electromagnetically induced transparency by NMR
Electromagnetically Induced Transparency (EIT) is a quantum nonlinear optical interference effect in which light at a certain frequency makes normally opaque atomic systems transparent to light at another frequency. Recent experiments in Atomic Molecular and Optical (AMO) physics demonstrated how …
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The Elicited Imitation Task as a method for French proficiency assessment in institutional and research settings
… the validity of an Elicited Imitation Task (EIT) for evaluating French proficiency assessment in both research and classroom settings. The goal is to supplement the French tests used for placement at the University of Illinois. The motivation for the current research project comes from the …
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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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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 for internal radiation therapy
… 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 healthy tissue, it is hypothesized …
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Electromagnetically Induced Transparency and electron spin dynamics using superconducting quantum circuits
… as Electromagnetically Induced Transparency (EIT). An EIT (denoted as S-EIT) based technique has been proposed to demonstrate microwave transparency using a superconductive quantum circuit exhibiting two metastable states (e.g., a qubit) and a third, shorter-lived state (e.g., the readout …
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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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