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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 11 of 11 for “"Microcalcifications"”.
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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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The impact of simulated motion blur on breast cancer detection performance in full field digital mammography (FFDM)
… malignant masses, 62 containing malignant microcalcifications and 124 normal cases) for three conditions: no motion blur (0.0 mm) and two magnitudes of simulated motion blur (0.7 mm and 1.5 mm). Abnormal cases were biopsy proven. A free-response observer study was conducted to compare …
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Multimodal spectroscopy : real-time diagnosis of breast cancer during core needle biopsy
… of tissue removed during core needle biopsy. Microcalcifications are used as targets to position biopsy devices, as they may indicate the presence of malignancy. Despite stereotactic guidance, needle biopsy fails to retrieve target microcalcifications in up to 15% of patients. Optical …
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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 …
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Segmentation, co-registration, and correlation of optical coherence tomography and X-ray images for breast cancer diagnostics
… usage. Micro-CT is useful in detecting microcalcifications, the most apparent target of the screening mammogram. OCT can be utilized in the specific cases where high resolution is desired and penetration depth does not need to be over a few millimeters. In the case of a needle probe, OCT …
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Krūties carcinoma in situ tipai, diagnostika, gydymas ir prognozė /
… may detect indistinct masses in the breast or microcalcifications. Other commonly used methods for the diagnosis of breast carcinoma in situ are ultrasound and magnetic resonance imaging (MRI). The final diagnosis is confirmed by a fine-needle biopsy or surgery and histological analysis of the …
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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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The impact of viewing conditions on image quality assessment tasks in mammographic quality control
… (groups of multi directional filaments, microcalcifications and low contrast detail discs) under the 12 conditions. During the second sub-phase the participants evaluated the number of low contrast detail discs separately under the same 12 conditions in order to investigate how the …
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Aportación a la extracción de conocimiento aplicada a datos mediante agrupamientos y sistemas difusos
… atypical pixels that could be linked to microcalcifications in order to detect breast cancer, or wood knots for assess its quality, both cases treated on this thesis, or in any other application for industry or health, in example, where it does not matter if pixels to find are in very …
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Impact of Percutaneous Transluminal Intervention on Vascular Hypoxia and the Role of Micro-calcifications on Atherosclerotic Plaque Rupture
<p>Atherosclerotic disease is initiated by cholesterol build-up beneath the endothelium, which evolves into a fibroatheroma, a lipid-rich plaque covered by a fibrous cap. Many of these plaques are considered as vulnerable, as they grow to occlude the luminal section of the artery (chronically …