Search for dissertations about: "k-space"
Showing result 1 - 5 of 9 swedish dissertations containing the word k-space.
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1. k-space Models in MRI Using the Concept of Partitions, Applications with special reference to Overhauser-enhanced techniques
Abstract : A new model describing the image formation in magnetic resonance imaging (MRI) has been developed. The k-space description of MRI pulse sequences is expanded by introducing new dimensions to describe the phase dispersion due to flow, acceleration, jerk, diffusion and magnetic field inhomogeneities. READ MORE
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2. Susceptibility effects in MRI and 1H MRS. The spurious echo artifact and susceptibility measurements
Abstract : When performing magnetic resonance (MR) experiments, a strong homogeneous magnetic field is often preferred, especially in clinical applications. However, all objects that are placed in the magnetic field will disturb the field homogeneity and cause local magnetic field gradients. READ MORE
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3. Fast and Accurate 4D Flow MRI for Cardiovascular Blood Flow Assessment
Abstract : The study of blood flow is essential in understanding the physiology and pathophysiology of the cardiovascular system. Small disturbances of the blood flow may over time evolve and contribute to cardiovascular pathology. READ MORE
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4. Applications of the golden angle in cardiovascular MRI
Abstract : The use of radial trajectories has been seen as a potential solution to highly efficient cardiovascular magnetic resonance imaging (MRI). By acquiring a broad range of spatial frequencies per repetition time, the acquisition is time-efficient and robust against motion. READ MORE
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5. Capturing the breath of the heart by magnetic resonance imaging : five-dimensional cardio-respiratory resolved cine imaging during free breathing
Abstract : Cardiac imaging with cardiovascular magnetic resonance has the advantage of enabling dynamic visualizations, several quantifiable measures, and good soft-tissue contrast. However, a major drawback is the need for breath holding during many acquisitions to limit motion artifacts. READ MORE