Searched for: contributor%3A%22van+Gijzen%2C+Martin+%28mentor%29%22
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Wagenaar, Claire (author)
In this thesis, several image segmentation techniques will be tested that eventually will be applied to MRI brain scans in order to detect hydrocephalus. The meth- ods include Sobel edge detection, Canny edge detection, active contour model (also known as snakes), k-means clustering and region growing. Furthermore two exten- sions are discussed....
bachelor thesis 2020
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Geçmen, Dilan (author)
Delft University of Technology (TU Delft), Leiden University Medical Center (LUMC), Pennsylvania State University (PSU) and Mbarara University of Science and Technology (MUST) have an ongoing collaboration to create an affordable, portable and simplified version of the magnetic resonance imaging (MRI) scan for the CURE children’s hospital to...
master thesis 2020
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Zoutendijk, Mike (author)
Structure Optimization has been an important subject with many applications for centuries. In the last sixty years, numerical optimization has facilitated large advancements in this field. One of the areas in Structure Optimization is Topology Optimization, which is used for Additive Manufacturing purposes. In this thesis we explore Static and...
master thesis 2019
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Waling, Manon (author)
De CT-scanner heeft een belangrijke rol in de medische wereld. Helaas gebruikt de CT-scanner voor het opstellen van een scan schadelijke straling. In dit onderzoek is nagegaan of er een betere beeldreconstructietechniek te vinden is voor het opstellen van een CT-afbeelding met gebruik van minder straling.<br/>De standaard voor het opstellen van...
bachelor thesis 2019
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de Haas, Lyanne (author)
MRI machines use superconducting magnets to create an image. However, these magnets are very expensive. It is possible to use weaker magnets in a low-eld MRI, but those will result in a lower signal-to-noise ratio, meaning the images will be polluted. An image can be smoothed by viewing it as the initial condition of a partial dierential...
bachelor thesis 2019
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van Zon, Manon (author)
MRI images are very useful for detecting diseases, as well as for the treatment of diseases. However, MRI scanners are usually too expensive for developing countries to purchase and maintain. Therefore, a less expensive scanner is being developed at Delft University of Technology and Leiden University Medical Center. Unfortunately, the images...
bachelor thesis 2019
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Meijer, Angeline (author)
This report describes the study on the optimization of the magnetic field generated by a low-field magnetic resonance imaging modality. In the optimization the Genetic Algorithm and a quasi-Newton Algorithm are used.
bachelor thesis 2019
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Coppoolse, Taco (author)
For a proper three-dimensional reconstruction of histology serial sections, adjustment of the slices is necessary for combining serial sections. Deformations occur due to the sectioning and acquisition pro-cess of the microscopic analysis of histology. By reconstructing the deformations with a transformation of the sections, a mathematical...
master thesis 2019
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Swart, Wouter (author)
The numerical simulation of brittle failure with nonlinear finite element analysis (NLFEA) remains a challenge due to robustness issues. These problems are attributed to the softening material behaviour and the iterative nature of the Newton-Raphson type methods used in NLFEA. However, robust numerical simulations become increasingly important,...
master thesis 2018
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Huijzer, Leonard (author)
The Wanda software package developed by Deltares can used for simulating both steady state and transient fluid flow in pipeline systems. Steady state simulations are used for initial system design and transient flow simulations are used for doing water hammer analysis in pipeline systems. For both types of simulations a system consisting of both...
master thesis 2018
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van Marlen, Patricia (author)
The TU Delft and the LUMC are creating a low-field MRI scanner to use in third world countries. This type of MRI scanner has many advantages, but a downside is the amount of noise in the obtained images. A way to reduce noise is diffusion filtering. This thesis discusses the theory of some linear and nonlinear diffusion filtering methods and...
master thesis 2018
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Steverink, Lisa (author)
In this thesis, the adaptation of the spectral clustering algorithm to the privacy preserving domain was investigated. The spectral clustering algorithm divides data points into clusters according to a measure of connectivity. A pivotal part of spectral clustering is the partial eigendecomposition of the graph Laplacian. Two numerical algorithms...
master thesis 2017
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van Dongen, Eef (author)
Ice flow, forced by gravity is governed by the Full Stokes (FS) equations, which are computationally intensive to solve due to their non-linearity. Therefore, it has been unavoidable to approximate the FS equations when modeling growth and collapse of an ice sheet-shelf system, which requires simulating many thousands of years. However, the most...
master thesis 2017
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