Browsing by Subject "Computed Tomography"
Now showing items 1-13 of 13
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A Strategy for Matching Noise Magnitude and Texture Across CT Scanners of Different Makes and Models
(2012)<bold>Purpose: </bold> The fleet of x-ray computed tomography systems used by large medical institutions is often comprised of scanners from various manufacturers. An inhomogeneous fleet of scanners could lead to inconsistent ... -
Accuracy and Patient Dose in Neutron Stimulated Emission Computed Tomography for Diagnosis of Liver Iron Overload: Simulations in GEANT4
(2007-08-13)Neutron stimulated emission computed tomography (NSECT) is being proposed as an experimental technique to diagnose iron overload in patients. Proof-of-concept experiments have suggested that NSECT may have potential to make ... -
Advanced Techniques for Image Quality Assessment of Modern X-ray Computed Tomography Systems
(2016)X-ray computed tomography (CT) imaging constitutes one of the most widely used diagnostic tools in radiology today with nearly 85 million CT examinations performed in the U.S in 2011. CT imparts a relatively high amount ... -
Development of an Integrated SPECT-CmT Dedicated Breast Imaging System Incorporating Novel Data Acquisition and Patient Bed Designs
(2010)This thesis research builds upon prior work that developed separate SPECT and CT (computed mammotomography, or breast CT) devices that were independently capable of imaging an uncompressed breast in 3D space. To further ... -
Effects of High Volume MOSFET Usage on Dosimetry in Pediatric CT, Pediatric Lens of the Eye Dose Reduction Using Siemens Care kV, & Designing Quality Assurance of a Cesium Calibration Source
(2017)Project 1: Effects of High Volume MOSFET Usage on Dosimetry in Pediatric CTPurposeThe objective of this study was to determine if using large numbers of Metal-Oxide-Semiconducting-Field-Effect Transistors, MOSFETs, effects ... -
Functional and Molecular Imaging Using Nanoparticle Contrast Agents for Dual-Energy Computed Tomography
(2017)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 ... -
Hybrid Reference Datasets for Quantitative Computed Tomography Characterization and Conformance
(2018)X-ray computed tomography (CT) imaging is the second most commonly used clinical imaging modality with an estimated 82 million clinical exams performed in the U.S in 2016. Despite an average annual decline of 2% since a ... -
Minimum Detectability and Dose Analysis for Size-based Optimization of CT Protocols
(2014)Purpose: To develop a comprehensive model of task-based performance of CT across a broad library of CT protocols, so that radiation dose and image quality can be optimized within a large multi-vendor clinical facility.Methods: ... -
Predicting Task-specific Performance for Iterative Reconstruction in Computed Tomography
(2014)The cross-sectional images of computed tomography (CT) are calculated from a series of projections using reconstruction methods. Recently introduced on clinical CT scanners, iterative reconstruction (IR) method enables potential ... -
Radiation Dose to the Lens of the Eye from Computed Tomography Scans of the Head
(2016)While it is well known that exposure to radiation can result in cataract formation, questions still remain about the presence of a dose threshold in radiation cataractogenesis. Since the exposure history from diagnostic ... -
Relationship between Smoking and Abdominal Aorta Calcification on Computed Tomography.
(Korean journal of family medicine, 2019-07)<h4>Background</h4>Cigarette smoking increases the risk of atherosclerosis, which often develops as vascular calcification on radiologic examinations. This study evaluated the relationship between smoking-related factors ... -
Truth-based Radiomics for Prediction of Lung Cancer Prognosis
(2020)The purpose of this dissertation was to improve CT-based radiomics characterization by assessing and accounting for its systematic and stochastic variability due to variations in the imaging method. The anatomically informed ... -
Validation and Application of a Virtual Imaging Trial Platform for Accurate and Precise CT Quantifications in Lung Imaging
(2021)Computed Tomography (CT) is a prevalent imaging technique in modern medicine that provides physicians a non-invasive method to evaluate and diagnose various clinical conditions. To aid in diagnosis, it is important to have ...
