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 10 of 10 for “"flow quantification"”.
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Cerebrospinal fluid flow quantification in the brain using magnetic resonance imaging
… a way to quantitatively measure the shunt flow without surgery would be valuable. In this work, we modify a previously successful technique that quantified blood flow in the brain to quantify CSF flow. This technique, called flow enhanced signal intensity (FENSI), uses magnetic resonance …
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Full 3D Blood Velocity Mapping and Flow Quantification from Doppler Echocardiographic Images
… methods to calculate<br/>3D blood velocity and flow within the heart using 3D colour Doppler images. The<br/>principal goal of both methods was to overcome the main limitation of Doppler<br/>systems which is that the Doppler effect only measures one component of the velocity<br/>(parallel to the …
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3D reconstruction of cerebral blood flow and vessel morphology from x-ray rotational angiography
Three-dimensional (3D) information on blood flow and vessel morphology is important when assessing cerebrovascular disease and when monitoring interventions. Rotational angiography is nowadays routinely used to determine the geometry of the cerebral vasculature. To this end, contrast agent is …
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Computational Techniques for Advancing Photoacoustic Microscopy
… approach is developed to improve blood flow quantification, achieving high accuracy and computational efficiency. These computational advancements, demonstrated through in vivo applications, hold great potential to leverage the role of PAM in microvascular research.</p>
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Advances in Magnetic Resonance Phase‐Contrast Velocity Mapping
Phase-contrast MRI is used to assess functional flow parameters of the cardiovascular system. Long scan times of three-dimensional flow encoded MRI in particular have, however, hampered the acceptance of the method in a clinical routine setting. Furthermore, concerns have recently been raised about …
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Quantification of cardiac magnetic resonance imaging perfusion in the clinical setting at 3T
… disease (CAD) which can impair myocardial blood flow and may result in myocardial infarction. Mathematical modelling of cardiac DCE-MRI data can provide quantitative assessment of myocardial blood flow. Quantitative assessment of myocardial blood flow may have merit in further stratification of …
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Spectral/ Fourier domain Doppler Optical Coherence Tomography in the rodent retina
… for three dimensional retinal imaging and blood flow quantification using Doppler OCT measurements. A pre-objective scanning spectral / Fourier domain OCT system for in vivo rodent retinal imaging is designed and built. The system includes a broadband light source to achieve ~-3[mu]m resolution …
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The flow structure of interacting barchan dunes
… the effects of interacting barchan dunes on the flow structure. The barchan dune models were based upon an idealized contour map, the shape and dimensions of which were based upon previous empirical studies of dune morphology. The experimental setup comprised two, co-axially aligned barchan dune …
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Multi-Property Internal Flow Field Quantification using Molecular Filtered Rayleigh Scattering
… presented and analyzed for the multi-property quantification of internal flow fields. Validation is challenging in applying computational fluid dynamics (CFD) solutions to real-world scenarios, necessitating benchmark measurements with well-defined uncertainties. The ideal instrument for …
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Quantification of information flow in cyber physical systems
… cyber information leakage. Information flow analysis, which aims to control the way information flows among different entities, is better suited for CPSs than the access control security mechanism. However, quantifying information leakage in CPSs can be challenging due to the flow of …