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 22 for “"Magnetic Resonance Angiography"”.
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Phase enhanced time-of-flight magnetic resonance angiography
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1996.
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Acceleration of Subtractive Non-contrast-enhanced Magnetic Resonance Angiography
Although contrast-enhanced magnetic resonance angiography (CE-MRA) is widely established as a clinical examination for the diagnosis of human vascular diseases, non-contrast-enhanced MRA (NCE-MRA) techniques have drawn increasing attention in recent years. NCE-MRA is based on the intrinsic physical …
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Non-contrast Magnetic Resonance Angiography for Evaluation of Peripheral Arterial Disease
… disease patients. Contrast-enhanced x-ray and CT angiography are unsafe due to exposure to nephrotoxic contrast material and ionizing radiation. Recently, the FDA has also warned against the use of gadolinium-enhanced MRA (Gd-MRA) due to evidence that gadolinium could trigger a life-threatening …
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Computer-Assisted Analysis of Arterial Narrowing in Whole-Body Magnetic Resonance Angiography
… through long-term treatments. Whole-body magnetic resonance angiography (WBMRA) offers a quantitative assessment of whole body arterial atheromatous disease burden, making it a useful diagnostic tool for CVD. However the large datasets produced are very labour-intensive to examine, and …
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Comprehensive geometric modeling of human cerebral vasculature for quantitative vascular analysis
… of cerebral vasculatures from whole brain magnetic resonance angiography (MRA) scans of healthy adult subjects. Next, we employed the proposed geometric representation to generate the comprehensive geometric model of human cerebral vasculature from those segmented anatomies. In the end, we …
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Segmentation et extraction de caractéristiques des vaisseaux sanguins cérébraux à l'aide de l'IRM
… the blood vessels themselves. With the help of magnetic resonance imaging (MRI), it is possible to obtain images such as susceptibility weighted imaging (SWI) to see the veins or time-of-flight magnetic resonance angiography (TOF MRA) to visualize the arteries. These images allow having a …
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Usefulness of Multidetector Computed Tomography Angiography in Vertebral and Basilar Artery Dissection
… Multi-detector computed tomography (MDCT)angiography is not only a less invasive diagnostic technique than conventional angiography but also provides high quality images. We assessed clinical manifestations and usefulness of MDCT angiography in VBAD. METHODS: We retrospectively reviewed …
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Non-invasive diagnostic methods of intracranial arteries
… were to compare the agreement of different magnetic resonance angiography(MRA) techniques and digital subtraction angiography (DSA) in follow-up of intracranial aneurysms treated with coils in order to select the best MRA method, to evaluate the impact of increased iodine concentration in …
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The study of blood flow in human arterial bifurcations by the combination of CFD and MRI
… a combination of two new methodologies,namely magnetic resonance angiography (MRA) and computational fluid dynamics CFD), the precise patterns of flow anticipating the onset of disease at arterial bifurcations can now, in principle, be determined. However, flow simulations based on in vzvo data …
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Étude des liens entre les mesures quantitatives de la vascularisation cérébrale, les fonctions cognitives et la neuropathologie dans la maladie d’Alzheimer
… arteries were assessed by time-of-flight magnetic resonance angiography (TOF-MRA) and their quantitative measurements were calculated using a newly developed artificial intelligence algorithm. Cognitive status was assessed by MMSE (Mini-Mental State Examination), CDR, and several …
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Kepenų arterijų anatominės variacijos bei jų reikšmė radiologinėje diagnostikoje ir klinikinėje praktikoje /
… hepatic arterial variations, digital subtraction angiography, computed tomography angiography, magnetic resonance angiography.
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Biomarkers of neurological tissue injury and inflammation in paediatric tuberculous meningitis
… tomography was done on admission and magnetic resonance imaging (brain, spine and magnetic resonance angiography) at 3 weeks. Brain oxygenation was monitored invasively and non-invasively in selected patients. Clinical and neurodevelopmental outcomes were assessed at 6 months. Data …
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Cerebrovascular dysfunction : associations with midlife risk factors
… intracranial atherosclerosis using a novel magnetic resonance angiography technique. Using the community-based Atherosclerosis Risk in Communities study, we examined the association between various measures of extracranial and peripheral atherosclerosis and late-life intracranial …
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Multiparametric Estimation of Brain Hemodynamics with MR Fingerprinting ASL
… MR scan less than four minutes. The concept of magnetic resonance fingerprinting (MRF) was incorporated into the framework of ASL technique, and a novel sequence, MRF-ASL, was proposed. It is a promising alternative technique in cerebrovascular patients who cannot receive contrast agent based …
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Imaging The Vasculature With Susceptibility Weighted Imaging: Applications And Analysis
<p>Modern magnetic resonance imaging sequences allow detailed non-invasive imaging of both the arteries and veins. This work is divided into four sections that examine different applications and analysis of these sequences.</p> <p>Susceptibility weighted imaging (SWI) typically generates excellent …
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Applications of Machine Learning to Neuroimage Analysis in Cerebral Small Vessel Disease
… cases worldwide. Neuroimaging, particularly magnetic resonance imaging (MRI), is fundamental to the assessment, prognosis, and pathophysiological study of CSVD. Meanwhile, machine learning (ML), including deep learning (DL), methods are particularly well suited for analysing high-dimensional …
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Measurement of Cerebral Blood Flow Using Arterial Spin Labeling Magnetic Resonance Imaging
Cerebral Blood Flow (CBF) reflects the amount of blood perfusion in the brain, often defined as ml of blood per 100 gram of brain per minute. CBF is an important measure in understanding brain physiology and pathophysiology. Thus, it is important to establish a robust method suitable for …
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Patient-specific computational haemodynamics in the arteriovenous fistula and aorta of a chronic kidney disease cohort
… high-quality images from ferumoxytol-enhanced magnetic resonance angiography (FeMRA) were segmented for a cohort of chronic kidney disease (CKD) patients. These segmentations were then subsequently used for three CFD investigations, which is the first time FeMRA and CFD have been coupled …
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Using B-type natriuretic peptide and whole body contrast enhanced magnetic resonance imaging to detect asymptomatic cardiovascular disease and improve prediction of risk of cardiovascular disease: the TASCFORCE Study
… peptide (BNP) and whole body contrast enhanced magnetic resonance imaging (MRI) could identify those at low/intermediate risk or disease who will develop clinical disease and thus facilitate improved targeting of primary prevention at those most likely to benefit.<br/><br/>The Tayside Screening …
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