基于多层螺旋CT血管分析的感兴趣冠脉段最佳造影角度计算  

Calculation of Optimal Angiographic Angle for Segment of Interest Based on Multislice Computed Tomography Vessel Analysis

作　　者：张朝霞[1] 陈晓冬[1] 单建丰[1] 汪毅[1] 李伟锋[1] 郁道银[1] 贾忠伟[2] 浦奎[2] 王星[2] 

机构地区：[1]天津大学精密仪器与光电子工程学院光电信息技术教育部重点实验室,天津300072 [2]中国人民解放军第二五四医院心血管内科,天津300142

出　　处：《中国激光》2011年第11期136-140,共5页Chinese Journal of Lasers

摘　　要：多层螺旋计算机层析(MSCT)相对于传统的冠状动脉造影(CAG)具有无创、三维成像的特点。提出了一种基于MSCT血管分析的CAG感兴趣血管段的最佳造影角度计算方法。首先,应用最佳方向性梯度通量局部血管增强和自适应性区域生长将冠脉血管分割出来,构造三维血管树,并进行细化及B样条拟合,对感兴趣血管段在计算机中根据CT数据采集及冠脉造影时的系统参数,模拟造影过程,应用最小投影缩短和最小遮盖原则,计算最佳造影角度。实验结果表明,计算出的最佳角度下,血管的缩短比小于1%,优于实际工作角度。研究结果可用于冠心病的介入手术规划。Multislice computed tomography （MSCT） is noninvasive and 3D imaging compared with the traditional coronary angiography （CAG）. An optimal CAG viewing angle algorithm based on MSCT vessel analysis is proposed. First, a local vessel enhancement based on optimal oriented flux and locally adaptive threshold region growing is applied to extract the 3D coronary arteries model and then 3D thinning is performed and segment of interest is selected. According to the parameters during CT and CAG data acquisition, a perspective projection is performed to simulate the CAG procedure and the optimal viewing angle is calculated with the minimum foreshortening and minimum overlapping principle. Experimental results illustrate that the foreshortening percent is less than 1% in the obtained angle, which is close but superior to the working view angle. Therefore it can be applied to coronary artery disease intervention planning.

关 键 词：图像处理 冠状动脉造影 最佳角度 多层螺旋计算机层析 三维血管分割 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]