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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 192 for “"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
… 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; Rothney et al. …
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Agreement in the Army's Circumference Measurements and Dual-Energy X-Ray Absorptiometry
… circumference measurements and dual-energy x-ray absorptiometry (DXA). The purpose of this study was to quantify the agreement in body fat percentage estimates between the Army’s circumference measurements and dual-energy x-ray absorptiometry in male Army Reserve Officers’ Training Corps …
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Estimating Body Mass through Bone Mineral Density Studies Using Dexa (Dual-Energy X-Ray Absorptiometry)
… 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 individual’s …
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Cortical thickness estimation of the proximal femur from multi-view dual-energy X-ray absorptiometry
… 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 multi-view DXA …
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Assessing Body Composition Among Male Collegiate Runners and Swimmers Using Dual-Energy X-ray Absorptiometry (DXA)
… 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) and race. In …
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Variance In Percent Body Fat Between And Within Families As Measured By Dual-energy X-ray Absorptiometry
… 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 participant. …
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Dual X-Ray Absorptiometry May Not Be Sensitive Enough To Measure Changes In Regional Fat After Acute Exercise
… in total and regional body fat using Dual X-ray Absorptiometry (DXA). There is limited research about the change in body fat after an acute bout of physical activity. Knowing how body composition changes as a result of exercise is important for populations with symptoms of metabolic syndrome, …
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An Evaluation of the Limitations of the Technique of Dual Energy Absorptiometry in the Measurement of Bone Disease.
… rapidly in the last 15 years from Single Photon Absorptiometry to Dual Photon Absorptiometry (DPA) and currently Dual X-ray Absorptiometry (DEXA). This study examines the results from patients scanned on both Novo Lab 22a (DPA) and Hologic QDR 1000 (DEXA) machines used at this hospital and gives …
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Hand X-ray absorptiometry for measurement of bone mineral density on a slot-scanning X-ray imaging system
… sites for BMD measurement. Dual-energy X-ray absorptiometry (DXA) is the gold standard for measuring BMD due to low radiation dose, high accuracy and proven ability to evaluate fracture risk. Computed digital absorptiometry (CDA) has also been shown to be very effective at measuring the bone …
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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
… was to examine the use of dual energy x-ray absorptiometry (DEXA) based formulas to evaluate body volume (BV). The second purpose was to examine the validity of using predicted body volume measurements in four-compartment body composition models. </p> <p>Methods: Subjects were tested on three …
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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
… 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 rib9-11 sections were …
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Effective Measures of Weight Gain Five Years Post-Kidney Transplantation
… 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 lipoprotein-cholesterol, …
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Effect of glutamine supplementation combined with resistance training on muscular performance, body composition and protein degradation
… 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 with training (p
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Musculoskeletal Conformation of the Normal and Diseased Canine Stifle With Emphasis on Patella Luxation and Cranial Cruciate Ligament Deficiency
… 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 variance. The results …
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The Female Athlete Triad and Ethnicity
… (16 White & 3 Black) completed Dual Energy X-ray Absorptiometry scans and a questionnaire on the female athlete triad. Results: No significant difference was found between Black and White athletes and controls when looking at the prevalence of the Triad (p = .326) or acculturation (Unable to …
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The effects of a mushroom-egg white blend product on endothelial health and cardiovascular biomarkers
… 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 final (p = 0.043). …
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The Osteogenic Effects of 12 Weeks of Oral Supplementation of Androstenedione in Middle-Aged Men.
… 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). Twenty-four …
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