A new edge extraction algorithm of active contour model for magnetic resonance imaging
一种基于主动轮廓模型的MRI医学图像序列边缘提取算法

In order to extract the edge of the Magnetic Resonance Imaging(MRI) series,a new algorithm based on an improved active contour model was proposed.It modified some terms of the initial formula,which made the snake model not only precisely extract the edge of the protruding object in images but also approach to the concave part of the edge.It introduced exterior sanction energy,which could adaptively change its value to enlarge suction,so that control points could quickly constringe to the real contour without relying on the initial contour.Combined with pattern matching,this new method could increase the precision of transferring the result of edge extraction from one slice to another.Experiments show that this algorithm can obtain the edge of the desired object from a series of medical images faster and more accurately than before,and with only little user interaction.