基于图割与快速水平集的腹部CT图像分割

针对腹部CT图像中组织分割的问题,提出了一种基于图割与改进的快速水平集的交互式分割方法。首先对人工给定的一个待分割目标的初始轮廓作膨胀运算,将所得内部边界所有像素点作为源点、外部边界像素点作为汇点构造图,并通过图割方法对CT图像进行初步分割,然后以膨胀所得内部边界作为初始轮廓,通过基于区域竞争主动轮廓模型（RCAC）的...

Abdominal CT Image Segmentation Based on Graph Cuts and Fast Level Set

An interactive segmentation method based on graph cuts and improved fast level set is proposed to segment abdominal CT image.In our approach,an initial contour is sketched and dilated,a graph for graph cuts method is constructed while inner contour vertices based on morphologic dilation are identified as source and outer contour vertices as sink,the Pre-CT image segmentation is achieved by graph cuts method roughly,and then with the initial inner contour of dilation,the fast level set algorithm based on the Region Competition Based Active Contour(RCAC)model is applied to re-segment the result image by graph cuts.Thus,the low speed and leakage error in traditional level set methods are avoided.Furthermore,we extend this segmentation method to three dimensions,and several 3-D abdominal organs are segmented.Doctors could straightforwardly visualize the organs’relationship and structure topologically after 3-D reconstruction.Experimental results show that the proposed method is with interactive simply,robustness and high accuracy,and can support doctors for diagnosis and surgical planning effectively.