CT图像导引中穿刺针的快速分割方法  

Needle Rapid Segmentation Method in CT Image Guided Puncture

作　　者：谢志南[1] 张泽富[1] 

机构地区：[1]中山大学附属第五医院,珠海519000

出　　处：《现代计算机》2013年第23期26-29,共4页Modern Computer

摘　　要：在CT图像导引经皮穿刺中,快速准确定位穿刺针是手术成功的关键环节。为克服CT图像噪声影响和减少计算量,在OTSU阈值算法分割基础上,利用前景、背景区域继续对过度分割的目标进行二次处理,通过迭代计算求最优阈值,在分割输出图像熵最大时实现穿刺针的完整分割。仿真实验证明,标记的基准点和针尖的提取准确率达96%以上,具有较好的实用性。In CT guided pereutaueous images,how to locate the needle quickly and accurately is the key to successful operation. To overcome the CT image noise and reduce computation, processes over-segmented target, based on foreground and background regions from OTSU threshold algorithm, further to obtain the optimal threshold. The complete segmentation is achieved when the image entropy of segmentation output got maximal. Simulation results show that the reference point and the tip marker extraction accuracy is above 96%, and this method is proved feasible and reliable.

关 键 词：CT图像导引 OTSU算法 最佳阈值 分割算法 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]