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 7 of 7 for “"ultrahigh field"”.
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Ultrahigh Field Magnetic Resonance Imaging – Technical Development and Translational Applications
… effective and patient outcomes can be improved. Ultrahigh field MRI scanners, such as those operating at 7-‐tesla (7T), provide increased signal-‐to-‐noise ratio, which can be translated to higher spatial resolution. Additional advantages of high magnetic field MRI include enhanced vascular …
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Parallel transmission for magnetic resonance imaging on a 9.4 Tesla Human System.
… have been increasingly pushing towards using ultrahigh magnetic field (7 Tesla and higher) for magnetic resonance imaging in human to benefit from substantial increases in signal to noise ratio and contrast. However, at ultrahigh field, severe transmit B1 (B1+) inhomogeneity occurs, limiting …
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Advances in functional magnetic resonance imaging to facilitate brain research
… are critical for cognition and behaviors. High field functional magnetic resonance imaging (fMRI) based on blood oxygenation level dependent contrast (BOLD) is one such tool capable of non-invasively mapping functional columns and/or layer responses at working or resting state. However, several …
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Behavioural disinhibition in the syndromes associated with frontotemporal lobar degeneration
… glutamate and GABA in behavioural disinhibition. Ultrahigh-field magnetic resonance spectroscopy was used to measure glutamate and GABA in the frontal cortex of 44 patients with a FTLD syndrome and 20 healthy controls. Bayesian modelling of a response inhibition task was used to quantify …
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Parallel radiofrequency transmission for 3 Tesla and 7 Tesla magnetic resonance imaging
… are characterized by their main magnetic field strength. Commercially available clinical MR scanners commonly have main field strengths of 1.5 and 3 Tesla. Researchers increasingly explore clinical benefits of higher field strength scanners as they provide higher signal to noise ratio and …
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Mechanisms of apathy in health and Parkinson's disease
… of the noradrenergic system was quantified by ultrahigh field 7T MR imaging of the locus coeruleus. I found that the effect of atomoxetine on patients' prior beliefs varied strongly as a function of locus coeruleus integrity. Specifically, the patients with a more degenerate locus coeruleus …
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High resolution magnetic resonance spectroscopic imaging of the brain from 3T to 7T
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2024-08-01