Assessing Cardiac Dynamics based on X-Ray Coronary Angiograms
Assessing Cardiac Dynamics based on X-Ray Coronary Angiograms
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DOI：
10.4304/jmm.8.1.48-55
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发表时间：
2013-01
期刊：
影响因子：
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通讯作者：
Zheng Sun;Ya Zhou
中科院分区：
文献类型：
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作者：
Zheng Sun;Ya Zhou
解决了定量评估心脏运动的问题，包括心动周期期间的整体和局部动态性能。覆盖多个心动周期的体内X射线冠状动脉血管造影图像序列被用作源图像数据。每个阶段基于扩展超二次曲面 (ESQ) 表面模型的心脏三维 (3-D) 表面由 3-D 冠状血管骨架构建，该骨架由一对近正交的血管造影序列重建。根据已被医学观察和非刚性运动理论证实的先验解剖学和动态知识，心脏的复杂动态性能被分解为全局和局部分量。通过运动分解和补偿来定量估计所有组件的参数。因此，心动周期期间的心脏动态可以通过定量参数进行全面描述。利用临床采集的活体图像数据对所提方法进行了验证，结果验证了所提方法的可行性和准确性。
The problem of quantitatively assessing cardiac motion including global and local dynamic performances during cardiac cycles is addressed. In vivo X-ray coronary angiographic image sequences covering several cardiac cycles are used as source image data. The three-dimensional (3-D) surface of the heart based on extended superquadrics (ESQ) surface model in each phase is constructed from 3-D coronary vessel skeletons, which are reconstructed from a pair of nearly orthogonal angiographic sequences. Complex dynamic performances of the heart are decomposed into global and local components according to a priori anatomical and dynamic knowledge that have been confirmed by medical observations and non-rigid motion theory. Parameters of all components are quantitatively estimated through motion decomposition and compensation. Consequently, cardiac dynamics during cardiac cycles are comprehensively depicted with quantitative parameters. Validation of the proposed method with clinically acquired in vivo image data has been carried out, the results of which have verified the feasibility and accuracy of the proposed method.