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 9 of 9 for “"microcalcification"”.
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Imaging microcalcium in thoracic aortic disease
… is challenging. Deposition of calcium crystals (microcalcification) in the aortic wall occurs as a response to inflammation, cell stress and death, and its presence is thought to confer a vulnerable disease state in both thoracic aortic atheroma and aneurysm formation. 18F-Sodium fluoride …
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Breast Tomosynthesis: Aspects on detection and perception of simulated lesions
… aspects on detectability of simulated lesions (microcalcifications and masses) in digital mammography (DM) and breast tomosynthesis (BT). Perception in BT image volumes were also investigated by evaluating certain reading conditions. The first study concerned the effect of system noise on the …
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Multimodal Imaging of Inflammation at the Neurovascular Interface in Cerebrovascular Disease
… inflammation, along with associated regions of microcalcification, are histopathological features of atheroma at risk of rupture (so-called “vulnerable plaques”) that trigger thromboembolic stroke. While conventional clinical imaging simply measures the degree of vessel stenosis, it is a crude …
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Imaging of abdominal aortic aneurysm disease activity and implications for endovascular aneurysm repair
… emission tomography, which we termed aortic microcalcification activity (AMA) (Chapter 4). We then considered sodium [18F]fluoride uptake in 10 patients before and after their aneurysm was treated with EVAR (Chapter 5). Following this, we assessed sodium [18F]fluoride uptake in 37 patients …
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Novel positron emission tomography applications for imaging cardiovascular disease activity
… tomography and computed tomography which targets microcalcification (diameter <50 μm), providing different information to established macroscopic calcification (minimum diameter 200 to 500 μm) imaged with computed tomography. Indeed 18F-sodium fluoride PET has now been explored in a wide range of …
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Detection of breast cancer microcalcifications in digitized mammograms. Developing segmentation and classification techniques for the processing of MIAS database mammograms based on the Wavelet Decomposition Transform and Support Vector Machines
… normal and abnormal regions (which contain microcalcifications). The work proposed in this thesis is divided into three stages to provide a concept system for classification between normal and abnormal cases. The first stage is the Segmentation Process, which applies thresholding filters to …
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Detection of breast cancer microcalcifications in digitized mammograms. Developing segmentation and classification techniques for the processing of MIAS database mammograms based on the Wavelet Decomposition Transform and Support Vector Machines.
… normal and abnormal regions (which contain microcalcifications). The work proposed in this thesis is divided into three stages to provide a concept system for classification between normal and abnormal cases. The first stage is the Segmentation Process, which applies thresholding filters to …
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Molecular imaging of calcification and inflammation in aortic valve disease and atherosclerosis
… areas of pathologically high risk nascent microcalcification and was proven to have pharmacological properties highly favourable for PET imaging. Conclusions. 18F-fluoride PET/CT is a valuable tool for exploring pathobiology in CAVD and atherosclerosis may represent an attractive method for …
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Improving ultrasound display by retrieving high-frequency sonographic information
… visibility of an important breast cancer marker, microcalcifications. Our new results in analyzing intensity statistics provided a linear system framework to pursue our goal. Our analysis shows that intensity signals only contain low spatial-frequency components of the object, while high-frequency …