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 20 of 21 for “"Quantitative MRI"”.
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Zur Rolle frontobasaler Schleifensysteme bei psychiatrischen Störungen : eine quantitative MRI-Studie
Die hier vorgestellte Arbeit ist eine quantitative MRI-Studie. Es wurde der präfrontale Cortex in weitere Subareale untergliedert: in den dorsolateralen präfrontalen Cortex, den orbitofrontalen Cortex und den anterioren cingulären Cortex. Desweiteren wurden das Cerebellum sowie das …
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Quantitative MRI correlates of hippocampal and neocortical pathology in intractable temporal lobe epilepsy
… region to achieve seizure control. Advances in MRI have the potential to improve surgical treatment of epilepsy through improved identification and delineation of lesions. However, validation is currently needed to investigate histopathological correlates of these new imaging techniques. The …
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Three-dimensional Quantitative Magnetic Resonance Imaging of Carotid Atherosclerotic Plaque
… multi-contrast magnetic resonance imaging (MRI) can qualitatively identify these features and monitor disease progression. Compared to traditional contrast weighted imaging, quantitative MRI could provide an objective assessment of disease. Therefore, the general hypothesis investigated in …
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MRI techniques for quantitative and microstructure imaging
… of brain organization and neurological diseases. Quantitative MRI has been proved with its high sensitivity to microstructures, providing a safe, non-invasive approach for human in vivo imaging. However, quantitative MRI typically requires the acquisition of multiple images for biophysical model …
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Magnetic Resonance Based Imaging for Degenerative Cervical Myelopathy
… cord compression using Magnetic Resonance [MRI] has therefore become a gold standard assessment for diagnosis and popular outcome assessment. This approach has limitations, which are poorly recognised in clinical care and research, representing a knowledge translation gap. Improving MRI …
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Global and regional central nervous system sequelae of anti-neutrophil cytoplasmic antibody-associated vasculitis
… AAV survivors to control subjects using quantitative MRI and cognitive testing. Among AAV survivors with a median disease duration of 64 months, we found no difference in imaging markers of global white matter abnormality, although there was evidence of regional differences in the insular …
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Exploring Radiomics and Unveiling Novel Qualitative Imaging Biomarkers for Glioma Diagnosis in Dogs
… (ML) and radiology to extract and analyze quantitative features from medical imaging modalities such as Magnetic Resonance Imaging (MRI), Computed Tomography (CT), Positron Emission Tomography (PET), ultrasound (US) and digital radiographs (DX). By extracting pixel/voxel-level data, …
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Quantitative Magnetic Resonance Imaging For The Early Prediction of Treatment Response In Triple Negative Breast Cancer
… of responders to be de-escalated.</p> <p>Quantitative Magnetic Resonance Imaging (MRI) may be used to probe and measure aspects of the perfusion, diffusion, and mechanical properties of a cancer and its surroundings. In the research setting, several quantitative MRI biomarkers have shown …
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An Information Theory Model For Optimizing Quantitative Magnetic Resonance Imaging Acquisitions
<p>Quantitative magnetic resonance imaging (qMRI) is a powerful group of imaging techniques with a growing number of clinical applications, including synthetic image generation in post-processing, automatic segmentation, and diagnosis of disease from quantitative parameter values. Currently, …
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Multimodal neuroimaging and early neurobehavioural and developmental correlates of alcohol and methamphetamine exposed infants in Cape Town
… structural magnetic resonance imaging (MRI), diffusion tensor imaging (DTI), proton magnetic resonance spectroscopy (1H-MRS) and resting sate functional MRI (rs-fMRI) scans in approximately 100 infants (50 alcohol exposed and a matched number of control, unexposed babies) at 2-4 weeks of …
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Quantitative Magnetic Resonance Imaging of Knee Articular Cartilage and Effusion-Synovitis: The Structural Response to Changes in Joint Loading
… of this thesis was to investigate aspects of quantitative magnetic resonance imaging (MRI) as outcome measures in knee OA studies. Specifically, changes in articular cartilage composition and/or effusion-synovitis were examined in people with or at risk for knee OA and healthy controls, and …
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Treatment and outcome of anterior cruciate ligament injury: Truth or Consequences
… all had bone marrow lesions (BML) visualized on MRI. A strong independent relationship between cortical bone depression fractures and bone marrow lesion volumes (p<0.001) suggests that a high proportion of ACL injured knees suffer from extensive compressive trauma to the joint cartilage which …
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NMR studies of carbon dioxide sequestration in porous media
… space. The acquired propagators were compared quantitatively with the corresponding LB simulations. In addition, magnetic resonance imaging (MRI) techniques were used to characterise the extent of CO2 trapping in the bead pack. The acquired NMR propagators were compared to LB simulations …
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Brain volumetric MRI study of extremely low gestational age newborns (ELGANs) at 9 to 10 years of age
… High-resolution magnetic resonance imaging (MRI) scans were obtained from 82 ELGAN children using a dual-echo turbo spin-echo (DE-TSE) pulse sequence at 3.0T (or 1.5T at only one site). The DICOM MR images were processed with quantitative MRI algorithms programmed in Mathcad. The brain gray …
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Fast MRI with sparse sampling: models, algorithms, and applications
Conventional magnetic resonance imaging (MRI) methods are based on the Shannon-Nyquist sampling theorem. The number of required Nyquist samples grows exponentially with respect to the underlying physical dimension of the imaging problem, resulting in significant difficulty of achieving high …
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Advancements in MRI-based quantitative measurement of slow physiological flows: Applications in neurological and vascular disease
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2027-05-01
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Modelling brain tumours with network neurosciences and deep learning
… the widespread impact of gliomas. Meanwhile, quantitative MRI technology, including functional MRI and diffusion MRI, assisted in developing an emerging field called network neurosciences. The network neurosciences model the brain as a network consisting of macro-scale regional connectivity of …
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Quantitative Magnetic Resonance Imaging and Analysis of Articular Cartilage and Osteoarthritis
MRI plays an important role in the continuing search for a sensitive osteoarthritis (OA) imaging biomarker able to detect early, pre-morphological alterations in cartilage composition. Determining the compositional recovery pattern of cartilage following acute joint loading could potentially …
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Cardiac magnetic resonance imaging for non-invasive detection of myocardial fibrosis
… fibrosis. Cardiac magnetic resonance imaging (MRI) is a powerful high-resolution technology. It is also non-invasive and has a high tissue contrast. Importantly, it involves no ionizing radiation. Therefore, the objective of my work is to develop a sensitive and quantitative MRI technology to …
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