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 29 for “"Computed Tomography Scans"”.
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Exploring Cranial Macromorphoscopics from Adult Computed Tomography Scans Using an Anatomage Table
… of digital skeletal samples. This paper uses computed tomography scans of adults to test the efficacy of using the protocol developed by Stull et al. (2021), to collect macromorphoscopic (MMS) trait data from subadult computed tomography scans. This paper not only tests the potential …
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Effective dose estimation for U.S. Army soldiers undergoing multiple computed tomography scans
… modality used for assessing these injuries is computed tomography (CT). CT delivers more radiation dose than other diagnostic scanning modalities. Trauma patients are at an increased risk of radiation induced cancer because of the cumulative dose effects from multiple scanning procedures. …
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Incremental learning algorithm for anomaly detection applied to computed tomography scans in nuclear industry
During routine nuclear power plant (NPP) inspection, each maintenance tool is inspected manually before and after use on a nuclear reactor. This could result in long inspection duration (up to months), time, and resource wastage. To address this, an automated tool inspection process using a …
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An automated computer-assisted approximation of the nose in South Africans from CBCT (Cone Beam Computed Tomography) scans
… specific standards using Cone Beam Computer-Tomography scans.
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The clinical use and indications for head computed tomography scans in paediatric ambulatory care (short stay ward and medical emergencies) at a children’s hospital over a one-year period, 1st January-31st December 2013
Background: Computed tomography (CT) imaging is an indispensable tool in the management of acute paediatric illness. It offers quick answers, allowing timely lifesaving decision-making. Clinical evidence is required to maximise its benefits against radiation-exposure risks to patients and cost to …
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The Skeletal Biology of Hibernating Woodchucks (<i>Marmota monax</i>)
… bones were investigated in conjunction with computed tomography scans and three-point bending tests to determine bone density, geometry, and mechanical properties of the long bones throughout the year. In addition, serum protein expression was examined to ascertain bone resorption and …
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Accuracy of Implants Placed with Surgical Guides: Thermoplastic vs. 3-D Printed
… following the guided surgery protocol. Cone beam computed tomography scans of placed implants and the control implant were superimposed to measure deviations. <strong>Results</strong>: The thermoplastic group showed average deviations of 3.4 degrees, 1.3mm at the head, and 1.6mm at the apex of the …
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Three-dimensional image reconstruction of skeletal tissue from computed tomography
… such as MRI (magnetic resonance imaging) and CT (computed tomography).;In this thesis, we develop a simple process for the three dimensional image reconstruction of the human knee, starting from computed tomography scans. Designing a digital image processing technique which successfully separates …
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Accuracy of Volumetric Analysis Software Packages in Assessment of Tooth Volume Using CBCT
… in assessment of tooth volume using cone beam computed tomography and compare them to the volume obtained using an optical digital scanner. Twenty-four single rooted teeth indicated for extraction were collected. Cone beam computed tomography scans of these teeth resting in a custom scan jig …
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Anatomical Complications Related to Dental Implant Surgery
… oral cavity. Cadaveric photographs and cone beam computed tomography scans (CBCT) are used to help demonstrate the pathway of arteries and nerves within the osseous anatomy. CBCT scans will help clinicians have a better understanding of the anatomical structures when performing dental procedures …
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Three-Dimensional Evaluation of the Effect of Maxillary Incisor Retraction on the Palatal Bone and Root Resorption
… pre-treatment and post-treatment cone-beam computed tomography images of patients to quantitatively evaluate the effect of orthodontically retracting maxillary incisors on the height and labiolingual thickness of labial and palatal alveolar bone and incisor apical root resorption. …
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Acoustic scattering from sand dollars (Dendraster excentricus) : modeling as high aspect ratio oblate objects and comparison to experiment
… model of a sand dollar test was created from computed tomography scans. The Kirchhoff integral was then solved numerically for this model of the sand dollar. The finite element method, a numerical technique for approximating the solutions to partial differential equations and integral …
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On mechanics and microstructure of weak snow layers
… experiments with high-resolution micro-computed tomography scans. The results confirm density as the dominant first-order control, but also show that the microstructure systematically influences how stiffness and strength depend on density. Grain-type-dependent scaling laws capture this …
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Acoustic scattering from sand dollars (Dendraster Excentricus) : modeling as high aspect ratio oblate objects and comparison to experiment
… model of a sand dollar test was created from computed tomography scans. The Kirchhoff integral was then solved numerically for this model of the sand dollar. The finite element method, a numerical technique for approximating the solutions to partial differential equations and integral …
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Sex Differences in Arterial Destiffening with Weight Loss
… using dual energy x-ray absorptiometry and computed tomography scans, respectively. Subjects underwent a 12-week WL intervention. No baseline differences in AS were observed between sexes. However, men were heavier and demonstrated higher levels of VF while women were fatter and had higher …
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Development of a Fully Automated Al System for Skeletal Maturity Assessment Using Cone Beam CT
… cervical vertebrae maturity (CVM) from cone beam computed tomography scans. The total data set consisted of 1200 CBCT scans from orthodontic patients in the Midwest. For SOS, images with indistinct liminal stages were removed, leaving 723 scans remaining. For CVM, scans failing to capture the …
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Morphological and mechanical analysis of the porous structure of cortical bone
… then further sub-sectioned to 5 mm pieces. Micro-computed tomography scans were collected (4 μm/voxel), processed, and used to generate 3D models of the bone and of the porous network. Effective strain in each model was derived through finite element analysis using physiologic displacement …
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Imaging Based Models to Improve Lung Cancer Diagnosis
… lung cancer from chest radiographs (x-rays) and computed tomography (CT) scans, as well as accurately estimate the risk of future lung cancer, all while factoring in the importance of model explainability in clinical settings. Recent advances in deep learning have led to increased applications of …
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Assessment of hip fracture risk in astronauts exposed to long-term weightlessness
… finite element model derived from quantitative computed tomography scans of a representative cadaveric femur. Space flight associated changes in density, geometry, and muscle strength were incorporated. Results: Peak applied joint contact force ranges for mid-stance were: 1.2- 2.5 kN (Earth), …
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Dynamics and utility of cell-free DNA release following radiotherapy in prostate cancer and non-small cell lung cancer
… lung injury (RILI) was measured on follow-up computed tomography scans and correlation analysis carried out between the dose received by normal lung and the relative volume of RILI. Prostate cancer patients completed a questionnaire evaluating their attitudes to the risk of treatment toxicity. …
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