关键词: 分水岭, GVF算法, 三维肝脏分割

Abstract: Three-dimensional liver segmentation is a hot issue in medical image processing study. Accurate and fast liver segmentation from abdominal CT sequences is basis for liver lesions diagnose. The traditional active contour model is sensitive to contour and has large amount of computation, new method improves traditional contour set, and extends the algorithm to three-dimensional. In an abdominal CT image, using improved watershed algorithm to grow a liver from a seed block by the principle of the similarity between gray scale and texture, then using its edge as the start contour of the adjacent CT sequence, with GVF algorithm split a liver from a sequence of images, the process is repeated until getting all slices of the entire abdomen, then 3-D reconstructed.

Key words: watershed, GVF algorithm, 3-D liver segmentation