Archives: Thesis

739 to 744 of 860

21DEC 2009
Ph.D. Gallery
Anja Borsdorf
Adaptive Filtering for Noise Reduction in X-Ray Computed Tomography Abstract The projection data measured in computed tomography (CT) and, consequently, the slices reconstructed from these data are noisy. This thesis investigates methods for structure preserving noise reduction in reconstructed CT datasets. The goal is to improve the signal-to-noise ratio without increasing the radiation dose or […]Adaptive Filtering for Noise Reduction in X-Ray Computed Tomography Abstract The projection data measured in computed tomography (CT) and, consequently, the slices reconstructed from these data are noisy. This thesis investigates methods for structure preserving noise reduction in reconstructed CT datasets. The goal is to improve the signal-to-noise ratio without increasing the radiation dose or […]
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23NOV 2009
Ph.D. Gallery
Jingfeng Han
One-to-one Edge Based Registration and Segmentation Based Validations in Hybrid Imaging Abstract During the past decade, image registration has become an essential tool for medical treatment in clinics, by finding the spatial mapping between two images, observing the changes of anatomical structure and merging the information from different modalities. On the other hand, the matching […]
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20NOV 2009
Ph.D. Gallery
Dieter Hahn
Statistical Medical Image Registration with Applications in Epilepsy Diagnosis and Shape-Based Segmentation Abstract: The advances in scanner technologies over the past years and a growing number of modalities in medical imaging result in an increased amount of patient data. The physicians are faced with an overwhelming amount of information when comparing different scans. Therefore, automatic […]Statistical Medical Image Registration with Applications in Epilepsy Diagnosis and Shape-Based Segmentation Abstract: The advances in scanner technologies over the past years and a growing number of modalities in medical imaging result in an increased amount of patient data. The physicians are faced with an overwhelming amount of information when comparing different scans. Therefore, automatic […]
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02SEP 2009
Ph.D. Gallery
Marcus Prümmer
Cardiac C-Arm Computed Tomography: Motion Estimation and Dynamic Reconstruction Abstract Generating three dimensional images of the heart during interventional procedures is a significant challenge. In addition to real-time fluoroscopy, angiographic C-arm systems can also be used to generate 3-D/4-D CT images on the same system. One protocol for cardiac Computed Tomography (CT) uses electrocardiogram (ECG) […]Cardiac C-Arm Computed Tomography: Motion Estimation and Dynamic Reconstruction Abstract Generating three dimensional images of the heart during interventional procedures is a significant challenge. In addition to real-time fluoroscopy, angiographic C-arm systems can also be used to generate 3-D/4-D CT images on the same system. One protocol for cardiac Computed Tomography (CT) uses electrocardiogram (ECG) […]
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05JAN 2009
Ph.D. Gallery
Andreas Maier
Speech of children with Cleft Lip and Palate: Automatic Assessment Abstract This work investigates the use of automatic speech processing techniques for the automatic assessment of children’s speech disorders. The target group were children with cleft lip and palate (CLP). The speech processing techniques are applied to evaluate the children’s speech intelligibility and their articulation. […]Speech of children with Cleft Lip and Palate: Automatic Assessment Abstract This work investigates the use of automatic speech processing techniques for the automatic assessment of children’s speech disorders. The target group were children with cleft lip and palate (CLP). The speech processing techniques are applied to evaluate the children’s speech intelligibility and their articulation. […]
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04DEC 2008
Ph.D. Gallery
Frank Dennerlein
Image Reconstruction from Fan-Beam and Cone-Beam Projections Abstract This thesis addresses the problem of reconstructing static objects in 2D and 3D transmission computed tomography (CT). After reviewing the classical CT reconstruction theory, we discuss and thoroughly evaluate various novel reconstruction methods, two of which are original. Our first original approach is for 2D CT reconstruction […]Image Reconstruction from Fan-Beam and Cone-Beam Projections Abstract This thesis addresses the problem of reconstructing static objects in 2D and 3D transmission computed tomography (CT). After reviewing the classical CT reconstruction theory, we discuss and thoroughly evaluate various novel reconstruction methods, two of which are original. Our first original approach is for 2D CT reconstruction […]
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