Melnychuk A. Methods and US devices for images processing and the estimation of geometrical sizes of gall bladder

The object of study is the estimation of geometrical parameters of gall bladder system on diagnostic ultrasound images; the intention of study is to improve the efficiency of diagnostic parameters of gall bladder system on ultrasound images, by developing methods for images postprocessing and creation of hardware and software tools on their basis, methods based on the use of mathematical apparatus of the discrete signals theory, the spatial imaging methods, theory and measurement errors, mathematical modeling using modern computer technology, theoretical results - segmentation method of gall bladder ultrasound imaging developed further by analyzing local statistics histograms, which using of criteria such as the region in terms of echogenicity (hypo-and hiperehohenic) increased efficiency of image segmentation of gall bladder system. The mathematical model of speckle noise in ultrasound images was improved, which in contrast to the known value takes into account not only the current processed pixel noise, but the value of noise in his neighborhood and adequately reflects the real speckle noise. Method for filtering speckle noise in ultrasound images based on anisotropic diffusion was improved, which in contrast to the known introduced automatic detection threshold filtering by using a criterion for threshold criteria and stop iterative process, allowing to improve filtration. Practical results - device for adaptive filtering speckle noise was designed, which automatically adjusts the depth of the filter depending on your specific ultrasound image segmentation device ultrasound imaging of gall bladder system that lets to select objects with complex shape, with the segmented region having no gaps and holes and hardware-software means of determining the geometric parameters of gall bladder on ultrasound image. The degree of implementation - the results of the thesis introduced in the work of medical diagnostic center "DIAMED" (Vinnitsa) and the learning process of the study course "Ultrabig integrated circuits in automotive and energy saving electronics." Field (field) use - medical diagnostic systems.