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 8 of 8 for “"high-resolution CT"”.
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Improvements on low-cost high-resolution CT system
Computed tomography (CT) is an x-ray based inspection technique used to analyze the three dimensional structure of an object. The goal of this thesis is to show that good CT image quality can be achieved with low cost CT systems while maintaining high resolution and keeping the collection time for …
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Spatial Resolution Analysis of a Variable Resolution X-ray Cone-beam Computed Tomography System
<p>A new cone-beam computed tomography (CBCT) system is designed and implemented that can adaptively provide high resolution CT images for objects of different sizes. The new system, called Variable Resolution X-ray Cone-beam CT (VRX-CBCT) uses a CsI-based amorphous silicon flat panel detector …
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The characteristics of intersitial lung disease patients attending Groote Schuur Hospital Respiratory clinic
… and follow-up service for patients with suspected ILDs. We set out to determine the burden of IPF and progressive pulmonary fibrosis (PPF) in an African setting. Methods: All patients attending the GSH respiratory clinic with known or suspected ILD were identified over six months. …
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Palaeobiology and flight capacity of volant palaeognaths (Pan-Palaeognathae: Lithornithidae): implications for the common ancestor of extant palaeognaths and early crown birds
… In the remainder of this thesis, I make use of high-resolution CT scanning to investigate the morphology of lithornithids, and use this information to explore several aspects of early palaeognath palaeobiology. Chapter 3 is an investigation into the previously undescribed neurocranium, brain …
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Prognostication and disease monitoring in fibrotic interstitial lung disease
Introduction Fibrotic interstitial lung disease (f-ILD) causes significant morbidity and mortality worldwide. Progressive pulmonary fibrosis (PPF) describes a cohort of patients who develop progressive disease despite standard treatment. To provide optimal care, it is vital to identify those …
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Methane Gas Hydrate Morphology and its Effect on the Stiffness and Damping of some Sediments
… deep sea sediments and permafrosts. Concise detection<br/>and quantification of natural methane gas hydrate deposits, will allow for a more robust assessment<br/>of gas hydrate as a potential energy resource or natural geohazard. Current seismic methods, used to<br/>identify and quantify gas …
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Modeling, Simulation, And Visualization Of 3d Lung Dynamics
… clinical interventions and analyzing its effect on a human subject. The success of medical simulation is evidenced by the fact that over one third of all medical schools in the United States augment their teaching curricula using patient simulators. Medical simulators present combat medics and …
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Theoretical and Experimental Evaluation of Spatial Resolution in a Variable Resolution X-Ray Computed Tomography Scanner
<p>A variable resolution x-ray (VRX) computed tomography (CT) scanner can image objects of various sizes with greatly improved spatial resolution. The scanner employs an angulated discrete detector and achieves the resolution boost by matching the detector angulation to the scanner field of view …