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.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2011年第11期136-140,共5页
Chinese Journal of Lasers
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
image processing
coronary angiography
optimal viewing angle
multislice computed tomography
three dimensional vessel segmentation
