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 “"Dual-Energy Computed Tomography"”.
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Functional and Molecular Imaging Using Nanoparticle Contrast Agents for Dual-Energy Computed Tomography
<p>X-ray computed tomography (CT) is one of the most useful diagnostic tools for clinicians, with widespread availability, fast scan times, and low cost. CT imaging can reveal a patient’s anatomy in exquisite detail and is extremely useful in the diagnosis of a wide variety of diseases. However, CT …
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Identification of Intracranial Lesions With Dual-Energy Computed to mography and Magnetic Resonance Phase Imaging
<p>On conventional Single-energy Computed Tomography (SECT), lesions with an attenuation greater than 100 Hounsfield Units (HU) can be definitively diagnosed as calcification. However, low-density calcifications and hemorrhage may have overlapping attenuation ranges between 40 and 100 HU and, …
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Improving ion beam therapy treatment planning for metal implants by using dual-energy CT scanning
… like metals may aggravate this problem. Dual Energy Computed Tomography (DECT) allows to compute the electron density and effective atomic number. It could already be shown that this additional material information enables a more precise calculation of ion ranges. This thesis investigates …
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Performance Evaluation of Material Decomposition Using Rapid Kvp-Switching Dual-Energy Ct For Assessing Bone Mineral Density
… bone, and has previously been characterized with dual-energy x-ray absorptiometry (DXA) or single-energy computed tomography (SECT). Dual-energy computed tomography (DECT) is able to create two three-dimensional sets of images representing the densities of two materials in a given basis pair. DECT …
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Upscaling Lithology and Porosity Types from Microscopic to Core Domain with Thin Section Petrography, Dual Energy CT, and Rock Types: Creation of Diagenesis and Porosity Type Logs
… to the Core with Thin Section Petrography, Dual Energy CT, and Rock Types: Creation of Diagenesis and Porosity Type Logs Authors: Jacob M. Proctor, André W. Droxler, Naum Derzhi, Heath H. Hopson, Paul (Mitch) Harris, Pankaj Khanna, and Daniel J. Lehrmann ABSTRACT The primary objective of …
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Hepatocellular Carcinoma Image-Guided Intervention: Quantitative Characterization of Reagents For Thermochemical Ablation
… image guidance.</p> <p>Quantitative dual-energy computed tomography (DECT) imaging with cationic cesium (Cs<sup>+</sup>) as a theranostic was also evaluated for TCA image guidance. DECT high- and low-energy data was acquired of Cs<sup>+</sup> standards in a commercial phantom to …
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Imaging Techniques for Proton Range Determination in Proton Therapy
… SPR from Hounsfield Unit (HU) values of a single-energy computed tomography (SECT) scan through a stoichiometric calibration technique. This technique is subjected to a variety of factors that congregate on the uncertainties in SPR estimation, including the calibration uncertainty (up to 0.5% to …
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Dual Energy Computed to mography For Proton Therapy Treatment Planning
… estimated from the patient’s treatment planning computed tomography (CT) images based on the CT number-to-SPR calibration curve. The SPR derived from a single CT number carries large uncertainties in the presence of human tissue composition variations, which is the major drawback of the current …