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 50 for “"CT Scanning"”.
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Improving ion beam therapy treatment planning for metal implants by using dual-energy CT scanning
… of ion ranges in the patient’s tissue from CT images. The presence of non-tissue-equivalent mate- rials and materials with high photon attenuation like metals may aggravate this problem. Dual Energy Computed Tomography (DECT) allows to compute the electron density and effective atomic …
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DEVELOPMENT OF A NOVEL APPROACH TO ASSESS QUALITATIVE AND QUANTITATIVE DYNAMICS ASSOCIATED WITH THE SUBCUTANEOUS OR INTRAMUSCULAR ADMINISTRATION OF PHARMACEUTICALS AND ASSOCIATED PARENTERAL DELIVERY SYSTEMS
… been a significant increase in the number of injectable pharmaceutical products over the last decade that have been incorporated into unique delivery systems such as pen injectors, auto-injectors, or pre-filled syringes. The advancement of these delivery systems and the paradigm shift towards …
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Identification and reconstruction of bullets from multiple x-rays
The 3D shape and position of objects inside the human body are commonly detected using Computed Tomography (CT) scanning. CT is an expensive diagnostic option in economically disadvantaged areas and the radiation dose experienced by the patient is significant. In this dissertation, we present a …
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Current Concepts in the Aetiology, Pathogenesis and Management of Kienbock’s Disease
… has been debated. The disease encompasses a spectrum of age and gender but is classically considered to affect young-to-middle-aged male manual laborer’s. Both mechanical and vascular factors play a role in disease aetiology, and it is likely that a critical combination is important. Alteration …
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Pancreatic fluid collections : towards a classification to facilitate treatment selection
… on the management of pancreatic fluid collections (PFCs) undertaken at Groote Schuur Hospital. The aim of the study was to review the management outcome, via different treatment modalities, of pancreatic fluid collections according to a locally derived classification. Patients with …
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Error estimation in whole bone microstrain measurement when using digital volume correlation
Micro-CT scanning of murine femurs before and after uniaxial compression produce 3-dimensional images detailing changes within the bone micro-architecture. Digital volume correlation (DVC) is a mathematical technique used to determine strain within the bone volume, by tracing the dislocation of a …
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A BIOMARKER ENRICHMENT PHASE II TRIAL OF 177LU-DOTATATE IN METASTATIC NASOPHARYNGEAL CANCER WITH A SAFETY RUN-IN
… in Southeast Asia. There is a lack of effective targeted treatments for NPC. In this thesis, we investigate the prevalence and prognostic significance of somatostatin receptor 2 (SSTR2) expression in an international study comprising multiple clinical cohorts of 402 primary, locally …
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Value of follow-up CT in head injury assessment
INTRODUCTION: The question of when and if to perform follow- up CT scanning of the brain in a patient with a proven head injury remains pertinent, and the answer is not clear cut. This is even more so compounded when one tries to compare and equate what happens in a developed country with that of a …
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Three-dimensional assessment of dentofacial deformity in children with clefts
… found between the cleft children and their unaffected peers; nasal asymmetry that became more obvious in function was noted in cleft children; the maxillary dental arches of the children with repaired cleft palate were shallow, short and narrow; and the dental arch, deformity and the facial soft …
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3D Analysis of Fe-Ti Oxides and How They Affect Crystal-Plastic Deformation in Atlantis Bank, Southwest Indian Ridge
<p>This project focuses on the importance of the relationship between Fe-Ti oxide abundance and interconnectivity, and crystal-plastic deformation in Atlantis Bank, Southwest Indian Ridge by utilizing Micro-CT scanning. This was done through comparing the Micro-CT scans of 15 samples from three …
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Development and application of a 4-dimensional Computed Tomography simulator
… of a 4-Dimensional Computed Tomography (4D CT) simulation program. The simulation is used to understand and quantify the sources of image artifacts that arise from irregular patient breathing during 4D CT. Performance of the simulation is validated by comparing the simulation results with …
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The study of a 3 3-dimentional structure of the congenital anomalous stape stapes compared with normal s stape stapes using Micro Micro-CT
… is limited information about the internal structure of congenital anomalous ossicles. Recently, Micro CT scanning technology has been applied to analysis of skeletal structure. The data of normal ossicles and pathologic ossicle destructed by cholesteatoma were reported in our hospital. This …
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An optical computed tomography scanner for three dimensional gel dosimetry of radiotherapy dose distributions
… must be validated by measurement to ensure correct patient treatments. Traditional radiotherapy dosimeters do not measure dose entirely in 3D. They effectively ‘spot check’ accuracy at discrete points or planes, without the ability to fully visualise measured dose distributions in true 3D. True …
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Cancellous bone use in the estimation of sex in a South African cadaveric and forensic sample
… Imaging techniques such as X-rays and CT scanning have become an avenue in which research into the field of anthropology has expanded. LODOX imaging finds itself in an ideal position due to its widespread availability in most mortuaries in South Africa, primarily used for trauma …
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Analysis of Red Oak Timber Defects and Associated Internal Defect Area for the Generation of Simulated Logs
… a database is finite. Real log and external defect data was obtained from the Forest Service Northeastern Research Station in Princeton, West Virginia for red oak (Quercus rubra, L.) logs. These data were analyzed to determine distributions for log and external defect attributes, and the …
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Scanning Methods as Monitoring, Verification, and Accounting tools for CO₂ Sequestration in Unconventional Gas Reservoirs
… gas reservoirs in carbon dioxide sequestration activities is a relatively new and unexplored concept currently undergoing pilot scale testing. Sequestration has the potential for enhancing gas recovery while mitigating carbon dioxide to long term storage structures. Due to the extremely complex …
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Towards Cyber-Physical Security for Additively Manufactured Parts via In Situ Monitoring and Electromechanical Impedance
The layer-by-layer nature of additive manufacturing (AM) allows for toolless fabrication of highly complex geometries that cannot be made via traditional processes. AM is unique in its ability to precisely define both the material properties and geometric shape throughout the volume of a part, …
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Feature Extraction and Feasibility Study on CT Image Guided Colonoscopy
Computed tomographic colonography(CTC), also called virtual colonoscopy, uses CT scanning and computer post-processing to create two dimensional images and three dimensional virtual views inside of the colon. Computer-aided polyp detection(CAPD) automatically detects colonic polyps and presents …
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Mechanistic modelling of bioavailability: putting soil microbiology in its pore scale context
… the relationship between the physical soil structure and related functional characteristics. The use of CT scanning technology provided a means of obtaining high-resolution digital reconstructions of the internal soil structures in three dimensions thus allowing, for the first time, the internal …
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Factors Influencing the Morphology of Sea Ice
… ice and rising sea levels, more studies are conducted on sea ice morphology and factors influencing the growth of ice. Sea ice is an integral part of the global climate system. It plays a vital role in the polar ecosystem, providing a habitat for organisms. Sea ice growth and behaviour has been …
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