| 孙正,郁道银,姜浩.造影图像序列中血管运动跟踪的Snake方法[J].中国医学影像技术,2004,20(11):1779~1783 |
| 造影图像序列中血管运动跟踪的Snake方法 |
| Snake approach for motion tracking of heart vessels in angiographic sequence |
| 投稿时间：2004-06-12 |
| DOI： |
| 中文关键词: 冠状血管造影术 运动跟踪 Snake 动态规划 |
| 英文关键词:Coronary angiography Motion tracking Snake Dynamic programming |
| 基金项目:本研究为高等学校博士学科点专项科研基金资助项目(20030056018)。 |
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| 中文摘要: |
| 本文提出一种对心血管造影图像序列中的血管段进行运动跟踪的方法。采用Snake模型,将前一帧图像中Snake的停留位置作为当前帧Snake的初始位置,选择适当的能量函数,使能量函数最小,Snake 变形得到当前时刻的血管骨架。分别采用动态规划算法和贪婪算法求解最优化问题,并从迭代次数、计算时间和收敛性方面进行比较;采用临床得到的冠状动脉造影图像序列对算法进行验证。 |
| 英文摘要: |
| A novel method tracking two-dimensional motion of heart vessels from angiographic sequences based on Snake was presented in this paper. The skeleton position in previous frame was used as initial guess of its position in the current frame, and dynamic information between consecutive time instants could be obtained during Snake deforming from its initial position to current position. Dynamic programming and greedy algorithm were adopted respectively in the calculation of optimal Snake, and their characteristics in terms of the number of iterations, computation cost and convergence were discussed. The effectiveness of this method has been demonstrated on clinical single-plane coronary artery angiograms and results were encouraging. |
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