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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 148 for “"dual energy X-ray absorptiometry"”.
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Standards in clinical dual energy x-ray absorptiometry
Dual Energy X-ray Absorptiometry (DXA) is a digital x-ray technique designed to quantify bone mineral density (BMD), primarily of the lumbar spine and hip, and hence to provide a measure of bone strength and propensity to fracture. The original technology was based on a pencil beam x-ray source but …
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Quantification of visceral fat using dual energy X-ray absorptiometry
… to estimate visceral adipose tissue. Recently, dual energy x-ray absorptiometry (DXA) has been validated against computed tomography as a valid and reliable estimate of visceral adipose tissue (Kaul et al. 2012) and a significant marker of cardiometabolic risk in adults (Katzmarzyk, et al. 2013; …
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Agreement in the Army's Circumference Measurements and Dual-Energy X-Ray Absorptiometry
… fat percentages and screen for overweight individuals. However, few studies have examined the agreement in body composition estimates between the Army’s circumference measurements and dual-energy x-ray absorptiometry (DXA). The purpose of this study was to quantify the agreement in body fat …
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Estimating Body Mass through Bone Mineral Density Studies Using Dexa (Dual-Energy X-Ray Absorptiometry)
… (BMD) and body mass, using data collected from dual x-ray absorptiometry (DEXA) scans of 107 collegiate football athletes. Athletes are a good fit for this study because they have achieved or almost achieved their peak bone mass by this age, and the weight fluctuations that occur throughout an …
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Cortical thickness estimation of the proximal femur from multi-view dual-energy X-ray absorptiometry
… and involves a significant radiation dose. Dual-energy X-ray absorptiometry (DXA) is the preferred imaging modality for assessing fracture risk, and is used routinely in clinical practice. This thesis proposes two novel methods which measure the cortical thickness of the proximal femur from …
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Assessing Body Composition Among Male Collegiate Runners and Swimmers Using Dual-Energy X-ray Absorptiometry (DXA)
… among collegiate runners and swimmers using dual energy X-ray absorptiometry (DXA) for body composition measurement. A data subset was gathered for post-hoc analysis on a group of Caucasian male Cal Poly swimmers (n=20) and Cal Poly track and field runners (n=20) of similar age (18-25 years) …
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Variance In Percent Body Fat Between And Within Families As Measured By Dual-energy X-ray Absorptiometry
… fat between and within families as measured by dual-energy x-ray absorptiometry (DXA). Methods: Percent body fat (%BF) assessed in 95 females, 120 males (included 54 sets of biological siblings) using DXA. Physical activity questionnaire used to assess current physical activity habits in each …
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Comparison Of Air Displacement Plethysmography And Dual-Energy X-Ray Absorptiometry For Estimation Of Body Fat Percentage In National Collegiate Athletic Association Division I Athletes
The aim of this research is to study the Apple iOS and Android mobile frameworks from a developers' perspective. The first chapter introduces a historical overview of operating systems for mobile devices as well the motivation and objectives of the research. The second chapter introduces basic …
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Use Of Dual Energy X-Ray Absorptiometry Measurements To Evaluate Total Body Volume When Compared To Air Displacement Plethysmography For Evaluating Body Composition In A Four Compartment Model
… methods are critical to ensure that an individual is receiving correct data in which to base health, nutrition, and lifestyle decisions. With technological improvements, there are more reliable, high-quality testing devices for body composition than in the past. However, there remains …
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Reduction of minerals in feedlot diets of Nellore cattle: impacts on intake, performance, and nutrient requirements; and prediction of chemical rib section composition by dual energy x-ray absorptiometry in Zebu cattle
… composition through empirical equations using Dual Energy X-ray Absorptiometry (DXA). DXA is a validated method used to describe tissue composition in humans and other animals, but few studies have evaluated this technique in beef cattle, and especially in the Zebu genotype. A total of 116 …
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Effective Measures of Weight Gain Five Years Post-Kidney Transplantation
… (waist circumference, body mass index, and dual energy X-ray absorptiometry) and compared with baseline (pretransplant) values. Similarly, weight and body mass index (BMI) were obtained. Blood sampling was performed to measure levels of serum glucose, hemoglobin A1C, low-density …
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Effect of glutamine supplementation combined with resistance training on muscular performance, body composition and protein degradation
… isokinetic dynamometer), lean tissue mass (dual energy X-ray absorptiometry) and muscle protein degradation (urinary 3-Methylhistidine by high performance liquid chromatography [HPLC]). Repeated measures ANOVA showed that strength, torque, lean tissue mass and 3- Methylhistidine increased …
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Musculoskeletal Conformation of the Normal and Diseased Canine Stifle With Emphasis on Patella Luxation and Cranial Cruciate Ligament Deficiency
… radiography, computed tomography, and dual-energy X-ray absorptiometry. Pelvic limbs of dogs without CCL disease were classified as normal, whereas those of Labrador Retrievers with CCL deficiency were considered as diseased. Variables were compared between groups using analysis of …
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The Female Athlete Triad and Ethnicity
… the current literature on the Triad and individual components, to investigate the relationship between the Triad and the prevalence in different ethnicities (White and Black), and determine if acculturation has an effect on disordered eating or the Triad in college aged females using …
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The effects of a mushroom-egg white blend product on endothelial health and cardiovascular biomarkers
… An EndoPAT® measured endothelial function, a dual energy x-ray absorptiometry (DXA) machine measured body composition, and a fasting blood draw was collected to assess cardiovascular and lipid biomarkers. EWO consumption significantly decreased visceral adipose tissue volume from baseline to …
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The Osteogenic Effects of 12 Weeks of Oral Supplementation of Androstenedione in Middle-Aged Men.
… increases in BMD.</p><p>BMD (measured by dual energy x-ray absorptiometry) and biochemical markers of bone turnover (1, 25 OH2 Vitamin D, calcitonin, deoxypyrodinoline, and parathyroid hormone) were assessed before and after 12 weeks of dietary androstenedione supplementation (200 mg/d). …
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The association between circulating vitamin d levels and body composition in collegiate female athletes
… body fat percentage assessments via dual energy X-ray absorptiometry (DXA) scans, serum vitamin D levels determined via fingerstick and dried blood spots, followed by liquid chromatography/tandem mass spectrometry (LC-MS/MS). In addition, sunlight badges worn during a 24-hour period …
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Upper Body Characteristics Related To Double Pole Performance in Female Cross Country Skiers
… Lastly, body composition was determined via dual-energy x-ray absorptiometry (DXA) with a focus on UB mass characteristics (i.e., trunk + arm lean mass). A significant (p = 0.02) correlation was observed between DPTT and UBLM. No significant (p > 0.05) correlations were observed for UBMS or …
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The Influence of Physical Activity on Musculoskeletal Characteristics and Fracture Risk at Growth
… musculoskeletal traits in a subsample by dual-energy X-ray absorptiometry (DXA) and muscle strength by a Biodex dynamometer. At follow-up we used peripheral computed tomography (pQCT) to assess the appendicular skeleton. The fracture risk was not affected by the intervention, rate ratio …
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