A Speckle Suppression Method for Medical Ultrasound Images Based on Local Statistics
نویسندگان
چکیده
White Matter Damage (leukomalacia) is detected by the visual inspection of ultrasound images of the neonatal brain by an expert. A need for a (semi) computerised way of segmenting the infected regions, in order to make quantitative measurements as an aid to the subjective diagnosis, is felt. The performance of snakes for this purpose, however, is heavily deteriorated by the presence of speckle noise. In this paper a new filter, based on local statistics in the image, is proposed, that removes a significant amount of speckle noise in the healthy parts, while it makes the areas infected by WMD more uniform, thus severely improving the performance of the snake. The results after applying the proposed technique are compared with the manual segmentation done by an expert. Keywords— speckle, medical ultrasound, texture, adaptive filter, segmentation, snake
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