Essays about: "k-space"
Showing result 1 - 5 of 15 essays containing the word k-space.
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1. Enabling Hybrid Real Time and Retrospectively Gated Imaging in a Numerical Phantom
University essay from KTH/Skolan för kemi, bioteknologi och hälsa (CBH)Abstract : Sector-Wise Golden Angle (SWIG) is a novel approach that was developed to address the limitations associated with Golden Angle radial imaging, commonly used for high temporal resolution flow measurements. Golden angle radial imaging is a time-efficient method that effectively reduces motion sensitivity. READ MORE
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2. Reconstruction of Accelerated Cardiovascular MRI data
University essay from Linköpings universitet/Statistik och maskininlärningAbstract : Magnetic resonance imaging (MRI), is a noninvasive medical imaging testing techniquewhich is used to produce detailed images of internal structure of the human body, includingbones, muscles, organs, and blood vessels. MRI scanners use large magnets and radiowaves to create images of the body. READ MORE
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3. Designing k-Space Filters to Improve Spatiotemporal Resolution with Sector-Wise Golden Angle (SWIG)
University essay from KTH/Medicinteknik och hälsosystemAbstract : The aim of this thesis is to design and evaluate k-space weighting filters for simultaneously improving the spatial and temporal resolution of cardiovascular MRI, with the ultimate goal of improving the accuracy of quantitative flow measurements, which are important for diagnosis and follow-up of heart dysfunction. Two different k-space filters were implemented and evaluated retrospectively to already acquired data. READ MORE
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4. Reduction of streak artifacts in radial MRI using CycleGAN
University essay from KTH/Skolan för kemi, bioteknologi och hälsa (CBH)Abstract : One way of reducing the examination time in magnetic resonance imaging (MRI) is to reduce the amount of raw data acquired, by performing so-called undersampling. Conventionally, MRI data is acquired line-by-line on a Cartesian grid. READ MORE
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5. CURRENT OVERSAMPLING ANALYSIS FOR ADVANCED CONTROL OF ELECTRIC AC DRIVES
University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)Abstract : The main purpose of this thesis is to develop a sensorless control for a synchronous reluctance motor by using the slope measurement of the current ripple introduced by the Space Vector Modulation.The position estimation is performed at each Space Vector Pulse Width Modulation period and it relies on the estimation of current derivatives. READ MORE