Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 12 of 12 for “"Mr Spectroscopic Imaging"”.
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A subspace approach to spectral quantification for MR spectroscopic imaging
… spectral quantification for magnetic resonance spectroscopic imaging (MRSI) is addressed in this thesis. We present a novel approach to solving this problem, incorporating both spatial and spectral prior information. More specifically, a new signal model is proposed which represents the spectral …
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Advanced parallel magnetic resonance imaging methods with applications to MR spectroscopic imaging
Parallel magnetic resonance imaging offers a framework for acceleration of conventional MRI encoding using an array of receiver coils with spatially-varying sensitivities. Novel encoding and reconstruction techniques for parallel MRI are investigated in this dissertation. The main goal is to …
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High-resolution multi-parametric molecular imaging via multi-dimensional MR spectroscopic imaging
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2027-05-01
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High-dimensional MR spectroscopic imaging integrating physics-based modeling and machine learning
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2025-12-01
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Learning based quantification and removal of lipid signals from MR spectroscopic imaging of the brain
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2025-12-01
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Design algorithms for parallel transmission in magnetic resonance imaging
… transmission technology in Magnetic Resonance Imaging (MRI). Novel algorithms are proposed which yield excellent excitation control, low RF power requirements, methods that extend to non-linear large-flip-angle excitation, as well as a new algorithm for simultaneous spectral and spatial …
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Prior -Information -Driven Magnetic Resonance Imaging and Magnetic Resonance Spectroscopic Imaging
… including reduced field-of-view dynamic imaging, T2 mapping, MR thermometry, and MR spectroscopic imaging.
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Detection of brain metabolites in magnetic resonance spectroscopy
While magnetic resonance imaging (MRI) derives its signal from protons in water, additional and potentially important biochemical compounds are detectable in vivo within the proton spectrum. The detection and mapping of these much weaker signals is known as magnetic resonance spectroscopy or …
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Identifying The Immune Related Metabolic Properties of Pancreatic Cancer Using Nuclear Magnetic Resonance Spectroscopy and Dynamic Magnetic Resonance Spectroscopic Imaging With Hyperpolarized Pyruvate
… to immunotherapy.</p> <p>Magnetic resonance (MR) is an intrinsically low sensitivity technique, but dynamic nuclear polarization allows one to increase the MR signal by five orders of magnitude. As described by the Warburg effect, even in the presence of an ample amount of oxygen, tumors …
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MRI based cerebral oxygenation measures in humans : technical development for use across lifespan
MRI based cerebral oxygenation measures could enable brain-centered clinical care and improve understanding of brain energy use throughout human development. We made technical improvements to two MR oxygenation imaging techniques, and explored the concordance between various methods to quantify the …
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Magnetic resonance spectroscopic imaging with 2D spectroscopy for the detection of brain metabolites
While magnetic resonance imaging (MRI) derives its signal from protons in water, additional biochemical compounds are detectable in vivo within the proton spectrum. The detection and mapping of these much weaker signals is known as magnetic resonance spectroscopy or spectroscopic imaging. Among the …
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Towards high-resolution magnetic resonance spectroscopic imaging: spatiotemporal denoising and echo-time selection
Magnetic resonance spectroscopic imaging (MRSI) enables acquisition of spatial-spectral nuclear spin distributions. Compared to conventional MRI, the additional spectral information provides a powerful tool for in vivo study of biological tissues. However, considerable practical challenges, which …