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 9 of 9 for “"Ultrasound velocity"”.
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An assessment of the role of Doppler ultrasound velocity waveform analysis of the umbilical artery in the diagnosis of fetal distress in labour
… An assessment of the role of Doppler ultrasound velocity waveform analysis of the fetal umbilical arteries in the diagnosis of fetal distress in labour is made from a review of the literature and clinical study. Study objectives: 1) To determine the value of screening with Doppler …
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The effect of neutron irradiation on the density of low-energy excitations in vitreous silica
… dielectric constant, and temperature-dependent ultrasound velocity have been made on a single piece of vitreous silica. These measurements were repeated after fast neutron irradiation of the material. It was found that the irradiation produced changes of the same relative magnitude in the …
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Evaluating Bone by Ultrasound
… and non-ionizing nature, non-invasive ultrasound techniques have been investigated as tools for evaluating bone quality and biomechanical competence. Quantitative ultrasound has been used clinically as a surrogate for the current gold standard measure in osteoporosis diagnosis - Bone …
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Fluid and structural modeling of the disease-free and atherosclerotic human carotid bifurcation
… diseased site of the cerebral circulation. Using ultrasound velocity measurements and magnetic resonance imaging (MRI) data of normal volunteers and patients in vivo, realistic blood velocity profiles and wall anatomy geometries are generated and imported into a commercial finite element package, …
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Characteristics of blood vessel wall and atherosclerosis using high frequency ultrasound signals
… many techniques like electrocardiogram, x-rays, ultrasound, electroencephalogram, computed tomography and magnetic resonance imaging use signal and image processing techniques to determine the physical and biological properties of the tissues and organs. The underlying principle in signal …
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Non-Destructive Evaluation and Mathematical Modeling of Beef Loins Subjected to High Hydrodynamic Pressure Treatment
… HDP-treament. The first study involved utilizing ultrasound and imaging techniques to predict textural changes in beef loins subjected to HDP-treatment using Warner-Braztler shear force (WBS) scores and texture profile analysis (TPA) features for correlation. Ultrasound velocity correlated very …
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Long-term management and condition assessment of concrete culvert
… were reviewed. By comparing all these methods, ultrasound was found to be the most reliable, fastest, and most widely used NDT method. Ultrasound wave velocity is related to the elastic properties of the material. Thus, a finite element analysis was used to simulate concrete with voids. Concrete …
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Radial and tangential velocity profiles in an annular flume with granular bed
DSpace SAF Submission Ingestion Package generated from Vireo submission #10065 on 2016-11-09 at 10:26:07
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Physics of ultrasonic wave propagation in bone and heart characterized using Bayesian parameter estimation
… use of Bayesian probability theory. Quantitative ultrasound is a noninvasive modality used for clinical detection, characterization, and evaluation of bone quality and cardiovascular disease. Approaches that extend the state of knowledge of the physics underpinning the interaction of ultrasound …