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 24 for “"Quantitative computed tomography"”.
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Predicting off-axis bone strength of the distal radius using high-resolution peripheral quantitative computed tomography based finite element modeling
… models generated from high-resolution peripheral quantitative computed tomography (HR-pQCT) images; however, these models are limited because they determine failure load under pure compressive loading conditions and neglect off-axis loads that occur during a fall on an outstretched hand. The …
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The quantification of pregnancy-induced bone mineral mobilisation in the maternal appendicular skeleton with novel peripheral quantitative computed tomography (pQCT) techniques.
… appendicular skeleton with novel peripheral quantitative computed tomography (pQCT) techniques. Adaptations in maternal calcium (Ca) economy occur during pregnancy to meet fetal demand and by birth a typical new-born contains 25-30g Ca. At the individual-level if Ca is mobilised it is …
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High-Resolution peripheral Quantitative Computed Tomography Based Finite Element Modelling of Distal Radius Strength: Assessing Effect of Heterogeneous Material Properties and Scan Site
The current standard high-resolution peripheral quantitative computed tomography (HR-pQCT) based finite element (FE) models of distal radius sections explains 66% of variance in experimental testing results on intact forearms under fall configuration testing. However, this FE model employs a …
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Using finite element models under multiple loading conditions to improve the association between radius and tibia microarchitecture and prevalent osteoporotic vertebral fracture
… radius, measurable by high-resolution peripheral quantitative computed tomography (HR-pQCT) exist between individuals with a prevalent vertebral fracture and healthy controls. As fracture is a result of mechanical failure, FE models of these sites in physiologically relevant loading conditions …
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Assessment of Human Alveolar Bone Density by Using Volumetric CT Machine
… in designated implants sites using cone-beam computed tomography (CBCT) and compared the measurements to those of quantitative computed tomography (QCT) and subjective bone density evaluation. Sixty-two designated implant sites in 9 human cadavers jaws were used. Indicator rods, 2 mm in …
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Ultrasonic propagation in cancellous bone
… ultrasonic measurements were also compared with quantitative computed tomography assessment and compressive strength testing.Many theories which are currently used to evaluate ultrasonic propagation in a porous material are reviewed, and three particular ones are developed in detail and applied …
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Localizing longitudinal changes in volumetric bone mineral density after acute knee injury using voxel-based morphometry
… imaging modalities (e.g., dual energy quantitative computed tomography; DE-QCT) that capture bone mineral density (BMD). Voxelbased morphometry (VBM) can provide a comprehensive assessment of the entire bone structure through voxel-by-voxel comparisons, revealing both spatial and …
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Validation of Subject Specific Computed Tomography-based Finite Element Models of the Human Proximal Tibia using Full-field Experimental Displacement Measurements from Digital Volume Correlation
Quantitative computed tomography-based finite element (QCT-FE) modeling is a computational tool for predicting bone’s response to applied load, and is used by musculoskeletal researchers to better understand bone mechanics and their role in joint health. Decisions made at the modeling stage, such …
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Translational studies into the effects of exercise on estimated bone strength
… 4 weeks. In study 2, the ability of peripheral quantitative computed tomography to provide very good prediction of midshaft humerus mechanical properties with good short-term precision in human subjects was demonstrated. In study 3, collegiate-level jumping (long and/or high jump) athletes were …
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Quantification of bone using a 3.0 tesla clinical magnetic resonance scanner
… imaging and spectroscopy (MRI & MRS) as a quantitative tool for diagnosing bone abnormalities at multiple skeletal sites, which could be used in conjunction with routine clinical imaging.MRI and MRS are routinely used in the clinical setting for the diagnosis of various types of diseases …
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The influence of two physical activity programs on bone and muscle health in youth with cerebral palsy and other neuromotor impairments.
… with CP and CP-like conditions using peripheral quantitative computed tomography (pQCT) scans of the tibiae. Bone and muscle parameters, including bone mineral content (BMC), bone mineral density (both trabecular and cortical; BMD), bone size, and muscle size, were compared to age-, sex-, and …
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Using HR-pQCT and finite element analysis to inform clinical assessment of distal radius fractures
… coupled with high-resolution peripheral quantitative computed tomography (HR-pQCT) allows for non-invasive in vivo assessment of bone density and stiffness throughout the fracture healing process, which may inform fracture healing progression and cast removal. Many fracture assessment …
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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 …
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The potential role of shearing load in the development of toe tip necrosis syndrome
… then imaged using High-Resolution Peripheral Quantitative Computed Tomography (HR-pQCT). Images were segmented, with measures of mean intensity acquired. Estimates of overall stiffness were also acquired using load-displacement curves. State statistics were used to compare local stiffness, …
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Foot Deformity and Bone Strength in Charcot Neuropathic Osteoarthropathy
… research was to develop methods using volumetric quantitative computed tomography: vQCT) to assess foot bone strength and foot deformity, in order to provide improved indices of CN onset and progression. Aim 1 describes the development of methods to assess bone mineral density: BMD) and geometric …
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Forearm Loading (FAL) Study: A Recreational Gymnastics Intervention within a Physical Education Setting
… also measured using high-resolution peripheral quantitative computed tomography (HRpQCT) which assessed total bone area (Tt.Ar), cortical area (Ct.Ar), trabecular area (Tb.Ar), bone mineral density (Tt.BMD), cortical thickness (Ct.Th), trabecular bone volume fracture (Tb.BV/TV), trabecular …
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The role of neuromuscular performance on bone strength and properties in the forearm and lower leg of children
… forearm and lower leg imaged using peripheral quantitative computed tomography (pQCT) and high resolution pQCT (HR-pQCT). Bone mass, density, area and estimated strength were assessed. Muscle area was determined from the pQCT scans and grip strength measured via a handheld dynamometer. Peak …
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Utilizing pQCT and Biomarkers of Bone Turnover to Study Influences of Physical Activity or Bariatric Surgery on Structural and Metabolic Status of Bone
… PA and the skeleton utilizing the peripheral Quantitative Computed Tomography (pQCT) and Dual-energy X-ray Absorptiometry (DXA) in pre-menopausal women; 2) effects of adjustable gastric banding (AGB) vs. Roux-en-Y gastric bypass (RYGB) surgeries on pQCT and DXA measures; 3) 6-month time course …
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Prognostication and disease monitoring in fibrotic interstitial lung disease
… are progressing despite treatment. The use of quantitative computed tomography (qCT) to analyse high resolution CT (HRCT) scans may enable more accurate prognostication and disease monitoring than current routine practice. qCT work to date has identified the pulmonary vasculature as a potential …
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Activity behavior and physiological profile of advanced-stage ovarian cancer survivors
… and musculoskeletal morphology (peripheral quantitative computed tomography), and completed questionnaires assessing HRQoL (SF-36) and PFD (Australian Pelvic Floor Questionnaire). Results: Compared to controls, OCS spent more time/day in prolonged sedentary bouts (i.e., uninterrupted …
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