Automatic Tracking and Measurement of Movement and Deformation of Aortic Arch Based on Image
基于图像的主动脉弓运动和变形参数自动跟踪测量方法

An automatic tracking approach based on image sequences of animal experiment is presented to measure the movement and deformation of aortic arch in vivo.For the first frame,the measurement window is selected manually and the boundary of aortic arch can be automatically recognized by using the gradient algorithm of pixel value to detect the edge within the window.Then the measurement window is adjusted to the most suitable position.For the following frames,the most suitable position of measurement window is automatically tracked and the diameter and the position of midpoint at different parts of the aortic arch are measured.The results of experiment and measurement of four rabbits show that the aortic arch tapers along itself and has the maximal diameter at the arch part.Its cycle of movement and deformation is strongly related to the cardiac cycle.The conclusions coincide well with the physiological situation and the obtained experimental results.It is proved that the presented approach is practical and the measurement data is accurate.