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Showing 1 to 16 of 16 for “"Brain--Magnetic resonance imaging."”.
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Spatiotemporal Encoding Methods for Brain Magnetic Resonance Imaging
Magnetic resonance imaging (MRI) is a widely used non-invasive imaging technology for both clinical diagnosis and neuroscientific research. However, the imaging sensitivity and specificity of brain MRI are limited by the well-known technical challenge of MRI acquisition—low image encoding …
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Recovery of high-resolution magnetic field distribution inside the brain from limited MRI data using machine learning prior
High-resolution field maps in brain magnetic resonance imaging (MRI) scans provide the field distribution information inside the brain which is essential in reconstructing high-quality MR images with no artifacts and distortions. These high-quality images are highly desired in clinical …
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THE CONTRIBUTION OF PHYSICAL ACTIVITY TO NEUROIMAGING INDICES AND COGNITIVE FUNCTION IN HEART FAILURE
… The current study examined whether specific neuroimaging indices (i.e. white matter hyperintensities (WMH) and medial temporal lobe atrophy (MTA)) mediate the relationship between physical activity and cognitive function in persons with HF. Eight-five HF patients completed a brief …
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A shape-based approach for image retrieval in healthcare information infrastructure
… initial step, a modular prototype system, called BrainSearch was implemented and used to demonstrate the utility of our algorithms and techniques on brain Magnetic Resonance Imaging (MR1) characterization and their suitability for image retrieval. The system supports retrieval based on shape …
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Machine Learning Methods for Personalized Treatment Response Characterization Using Clinical Care Brain MRI and Non-Imaging Data in Multiple Sclerosis
… new DMT using baseline clinical data, especially brain magnetic resonance imaging (MRI). Two RRMS cohorts (2/3 women) at 169 and 75 participants were examined, used for training and semi-external testing, respectively. Six key clinical variables and common brain MRI sequences: T1-weighted, …
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A study of ultra-high field strength structural and spectroscopic MR imaging in dementia with Lewy bodies and Alzheimer’s disease
… I present a detailed investigation of neuroimaging changes found in DLB compared to in AD, in comparison to cognitively healthy older adults, using ultra-high field, 7 tesla (7T), brain magnetic resonance imaging (MRI) and single voxel proton magnetic resonance spectroscopy (MRS). First, I …
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Incorporation of phase changes in functional magnetic resonance imaging
Functional magnetic resonance imaging (fMRI) data is acquired as a complex image pair including magnitude and phase information. The vast majority of fMRI experiments do not attempt to take advantage of the time varying phase information. The phase of the MRI signal is related to the local magnetic …
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A morphometric study of the brain ventricles of patients diagnosed with Chronic Hydrocephalus at Groote Schuur Hospital
… volume space is dangerous as it presses onto the brain parenchyma and the surrounding areas and may damage them. Ventricular enlargement is a radiological indicator of hydrocephalus and has been one of the features used to diagnose the condition, with the ICP measurement used to confirm the …
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Resource allocation of the human brain : a competitive equilibrium approach
… study the resource allocation of a functioning brain is proposed. The mechanism is based on the theory of competitive equilibrium (CE), where users (cortical areas of the brain) are competing for a finite resource such as oxygenated blood. Concepts of CE are mathematically adjusted to be used …
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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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Investigating mechanisms of hemodynamic control in the brain
… neural activity and blood flow that allows the brain to exhibit increases in blood flow to areas of elevated neural activity during sensory stimulation. It is these localized changes in blood flow, collectively known as the hemodynamic response, that are detected by modern neuroimaging …
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On the Use of Independent Component Analysis & Functional Network Connectivity Analysis: Evaluation on Two Distinct Large-Scale Psychopathology Studies
… the complexities and constructs of the brain and its functions. These analysis methods have proven to be integral in revealing trends in brain activity within individuals with mental disorders that are distinguishable from what would be considered normal' activity within healthy …
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Investigation of neural correlates of bladder control using functional magnetic resonance imaging (fMRI) in patients with overactive bladder (OAB)
… is some preliminary evidence using functional magnetic resonance imaging (fMRI) that the brain response to bladder filling in OAB patients is abnormal. The purpose of this research is to determine whether there are Central Nervous System (CNS) differences in modulating bladder function that …
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Automatic segmentation of magnetic resonance images of the brain
Magnetic resonance imaging (MRI) is a technique used primarily in medical settings to produce high quality images of the human body’s internal anatomy. Each image is of a thin slice through the body, with the typical distance between slices being a few millimeters. Brain segmentation is the …
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Effects of 2ʹ-fucosyllactose on brain and cognitive development of intrauterine growth restricted piglets
… age (SGA) neonates, increasing risk of brain and cognitive impairments that persist into adulthood. Human milk oligosaccharides (HMO) have been postulated to exert positive effects on brain development. HMOs are the third most abundant solid component of breast milk with …