Global ETD Search

1	REAL-TIME FLOW QUANTIFICATION TECHNIQUES IN CARDIOVASCULAR MRI APPLICATIONS Lin, Hung-Yu 26 June 2009 (has links) No description available. Biomedical Research Phase-Contrast Flow Quantification Velocity Measurement Fat Suppression Real-Time MRI
2	Dynamic Temperature Mapping - Real-time Strategies and Model-based Reconstructions Zhang, Zhongshuai 14 December 2016 (has links) No description available. 571.4 MR thermometry real-time MRI nonlinear reconstruction model-based reconstruction laser induced thermal therapy Biologie (PPN619462639)
3	Development of Advanced Acquisition and Reconstruction Techniques for Real-Time Perfusion MRI Roeloffs, Volkert Brar 16 June 2016 (has links) Diese Doktorarbeit befasst sich mit der methodischen Entwicklung von Akquisition- und Rekonstruktionstechniken zur Anwendung von Echtzeit-Bildgebungstechniken auf das Gebiet der dynamischen kontrastmittelgestützten Magentresonanztomographie. Zur Unterdrückung unerwünschter Bildartefakte wird eine neue Spoiling-Technik vorgeschlagen, die auf randomisierten Phasen der Hochfrequenzanregung basiert. Diese Technik erlaubt eine schnelle, artefaktfreie Aufnahme von T1-gewichteten Rohdaten bei radialer Abtastung. Die Rekonstruktion quantitativer Parameterkarten aus solchen Rohdaten kann als nichtlineares, inverses Problem aufgefasst werden. In dieser Arbeit wird eine modellbasierte Rekonstruktionstechnik zur quantitativen T1-Kartierung entwickelt, die dieses inverse Problem mittels der iterativ regularisierten Gauß-Newton-Methode mit parameterspezifischer Regularisierung löst. In Simulationen sowie in-vitro- und in-vivo-Studien wird Genauigkeit und Präzision dieser neuen Methode geprüft, die ihre direkte Anwendung in in-vitro-Experimenten zur "first-pass"-Perfusion findet. In diesen Experimenten wird ein kommerziell verfügbares Phantom verwendet, dass in-vivo-Perfusion simuliert und gleichzeitig vollständige Kontrolle über die vorherrschenden Austauschraten erlaubt. 571.4 real-time MRI radial MRI model-based reconstruction T1 mapping T1 relaxometry spoiling Golden Angle DCE perfusion Biologie (PPN619462639)
4	3D Navigation for Real-Time MRI using Six Degree of Freedom Interaction Devices Gardström, Karin January 2003 (has links) <p>Real-time MRI scanning is used to visualize tissue and organs in motion. The real-time approach requires new interaction techniques to facilitate interaction with the scanning plane. The aim of this thesis is to investigate the use of input with six degrees of freedom – 6DOF. An overview over existing 6DOF input devices is given. Three devices are chosen for implementation and evaluation, Flock of Birds, SpaceBall and SpaceMouse. </p><p>A simulator application is developed to test the different input devices. The simulator purpose is to imitate the real-time scanning situation. To be able to evaluate speed andaccuracy of the different interaction techniques, methods for measuring time and error are developed. A statistical survey is done on two different tasks to gather data of the interaction. The data is analyzed and the result is that the test subjects find the SpaceMouse superior to the other devices thanks to its kinesthetic feed-back properties and ergonomic benefits. However, the statistical data shows that Flock of Birds is the fastest device and no great difference is showed in accuracy between Flock of Birds and SpaceMouse. SpaceBall was the device that generated the least satisfying data.</p> Datorteknik 3D Navigation Interaction Six degrees of Freedom 6DOF Real-Time MRI Tracking VR Datorteknik Computer engineering Datorteknik
5	Vergleichende Analyse der Research Diagnostic Criteria for Temporomandibular Disorders (RDC/TMD) und der real-time-Magnetresonanztomographie. / Comparative analysis of research diagnostic criteria for temporomandibular disorders (RDC/TMD) and real-time-magnetic resonance imaging. Kling, Olaf Ansgar Chrysanthus 02 November 2011 (has links) No description available. 610 Medizin, Gesundheit Medicine RDC/TMD real-time-MRT RDC/TMD/ real-time-MRI 44.96 MED 569
6	3D Navigation for Real-Time MRI using Six Degree of Freedom Interaction Devices Gardström, Karin January 2003 (has links) Real-time MRI scanning is used to visualize tissue and organs in motion. The real-time approach requires new interaction techniques to facilitate interaction with the scanning plane. The aim of this thesis is to investigate the use of input with six degrees of freedom – 6DOF. An overview over existing 6DOF input devices is given. Three devices are chosen for implementation and evaluation, Flock of Birds, SpaceBall and SpaceMouse. A simulator application is developed to test the different input devices. The simulator purpose is to imitate the real-time scanning situation. To be able to evaluate speed andaccuracy of the different interaction techniques, methods for measuring time and error are developed. A statistical survey is done on two different tasks to gather data of the interaction. The data is analyzed and the result is that the test subjects find the SpaceMouse superior to the other devices thanks to its kinesthetic feed-back properties and ergonomic benefits. However, the statistical data shows that Flock of Birds is the fastest device and no great difference is showed in accuracy between Flock of Birds and SpaceMouse. SpaceBall was the device that generated the least satisfying data. Datorteknik 3D Navigation Interaction Six degrees of Freedom 6DOF Real-Time MRI Tracking VR Datorteknik Computer Engineering Datorteknik
7	Vergleichende Untersuchung zur Wirkweise unterschiedlicher Schienentherapiekonzepte bei anteriorer Diskusverlagerung mit Reposition / Comparative study of the mode of action of different splint therapy concepts in anterior disc displacement with reduction Wiegand, Hagen Fritz 02 October 2012 (has links) No description available. 610 Medizin, Gesundheit MED 565 Medicine bimaxillären Kalottenschiene Schienentherapie real-time-MRT bimaxillary calotte splint splint therapy real-time-MRI 44.96
8	Real-time MRI and Model-based Reconstruction Techniques for Parameter Mapping of Spin-lattice Relaxation Wang, Xiaoqing 18 October 2016 (has links) No description available. 530 Physik (PPN621336750) single-shot T1 mapping real-time MRI model-based reconstruction sparsity constraints Look-Locker inversion recovery radial FLASH myocardial T1 mapping parallel imaging GPU
9	Fast and Robust Multi-Dimensional Cardiac Magnetic Resonance Imaging Rosenzweig, Sebastian 10 June 2020 (has links) No description available. 571.4 magnetic resonance imaging real-time MRI cardiac MRI gradient delay correction self-gating time-delayed embedding simultaneous multi-slice imaging Biologie (PPN619462639)
10	Advances in real-time phase-contrast flow MRI and multi-echo radial FLASH Tan, Zhengguo 26 April 2016 (has links) No description available. 571.4 nonlinear inverse reconstruction radial MRI real-time MRI asymmetric echo phase-contrast flow MRI cardiovascular blood flow model-based reconstruction multi-echo T2* mapping off-resonance frequency mapping water-fat separation Biologie (PPN619462639)

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