Biomedical Engineering, Thoraxcenter, Erasmus MC, The Netherlands.
Ultrasound Med Biol. 2011 Apr;37(4):605-16. doi: 10.1016/j.ultrasmedbio.2011.01.010. Epub 2011 Mar 3.
The use of automated methods is becoming increasingly important for assessing cardiac function quantitatively and objectively. In this study, we propose a method for tracking three-dimensional (3-D) left ventricular contours. The method consists of a local optical flow tracker and a global tracker, which uses a statistical model of cardiac motion in an optical-flow formulation. We propose a combination of local and global trackers using gradient-based weights. The algorithm was tested on 35 echocardiographic sequences, with good results (surface error: 1.35 ± 0.46 mm, absolute volume error: 5.4 ± 4.8 mL). This demonstrates the method's potential in automated tracking in clinical quality echocardiograms, facilitating the quantitative and objective assessment of cardiac function.
自动化方法在定量和客观地评估心脏功能方面变得越来越重要。在这项研究中，我们提出了一种跟踪三维（3D）左心室轮廓的方法。该方法由局部光流跟踪器和全局跟踪器组成，它在光流公式中使用心脏运动的统计模型。我们提出了一种基于梯度的权重的局部和全局跟踪器的组合。该算法在 35 个超声心动图序列上进行了测试，结果良好（表面误差：1.35 ± 0.46 毫米，绝对体积误差：5.4 ± 4.8 毫升）。这表明该方法在临床质量超声心动图中的自动跟踪中具有潜力，有利于心脏功能的定量和客观评估。
