<> "The repository administrator has not yet configured an RDF license."^^ . <> . . "On Plane Wave Ultrasound Particle Image Velocimetry"^^ . "This thesis is concerned with the development of methodological and mathematical foundations of plane wave ultrasound particle image velocimetry. This innovative\r\ntechnology, also known as Echo PIV, is a non-invasive imaging technique developed to estimate the blood flow in the vascular system.\r\n\r\nIn this thesis, we address two relevant problems related to in-vitro Echo PIV. First, we consider the image reconstruction problem which amounts to estimating the location of small isolated scatterers, embedded in a homogeneous medium, from plane wave ultrasound measurements. We link the Delay and Sum method with the leastsquares\r\nsolution for the linearized inverse acoustic scattering problem. Numerical studies show that the least-squares approach provides accurate reconstruction results for synthetic and in-vitro data.\r\n\r\nIn the second part of the thesis, we focus on the motion estimation problem for pipe flow. For laminar and steady flow, we develop a global dictionary-based approach\r\nthat estimates the model flow parameter via an converging iterative refinement scheme. Furthermore, we show that the flow parameter can be the determined from the geometry\r\nof the image sequence spectra. To discriminate between the steady and turbulent flow, we design a filter-bank that is sensitive to all flow directions and extract the local\r\nvelocity field by analyzing the phase component of the response function for combined filters. We validate our methods on synthetic and in-vitro data."^^ . "2018" . . . . . . . "Ecaterina"^^ . "Bodnariuc"^^ . "Ecaterina Bodnariuc"^^ . . . . . . "On Plane Wave Ultrasound Particle Image Velocimetry (PDF)"^^ . . . "Ecaterina_Bodnariuc_Dissertation.pdf"^^ . . . "On Plane Wave Ultrasound Particle Image Velocimetry (Other)"^^ . . . . . . "lightbox.jpg"^^ . . . "On Plane Wave Ultrasound Particle Image Velocimetry (Other)"^^ . . . . . . "preview.jpg"^^ . . . "On Plane Wave Ultrasound Particle Image Velocimetry (Other)"^^ . . . . . . "medium.jpg"^^ . . . "On Plane Wave Ultrasound Particle Image Velocimetry (Other)"^^ . . . . . . "small.jpg"^^ . . . "On Plane Wave Ultrasound Particle Image Velocimetry (Other)"^^ . . . . . . "indexcodes.txt"^^ . . "HTML Summary of #24515 \n\nOn Plane Wave Ultrasound Particle Image Velocimetry\n\n" . "text/html" . . . "500 Naturwissenschaften und Mathematik"@de . "500 Natural sciences and mathematics"@en . .