基于GVF模型与光流场的左心室容积计算

Calculation of left ventricular volume based on GVF model and optical flow field

针对目前利用心脏核磁共振图像计算左心室容积存在的分割困难和计算量大的问题,提出了一种新的计算左心室容积的方法。首先采用基于梯度向量流的主动轮廓模型(GVF-snake)对左心室内膜进行分割获取初始轮廓线,再采用光流法跟踪得到心脏序列中后续帧图像的心腔内膜轮廓线,最后采用Simpson方法计算得到左心室容积。运用该方法得到的结果和用手工勾画心脏内膜轮廓得到的结果比较表明:GVF-snake与光流运动跟踪相结合的方法用于左心室容积的计算是可行的。

Concerning the problems of difficult segmentation and large computation in calculating the Left Ventricular （LV） volume using tagged cardiac magnetic resonance image, a new method of calculating the LV volume was proposed. First an advanced snake model based on the gradient vector field （GVF-snake） was used to segment the contour of the left ventricular and an initial snake line of the contour was got, then optical flow method was used to track the contour of the LV in the successive images. Finally, the Simpson method was applied to calculate the volume of the LV. The comparison of the result by this method with the result got manually shows that the combination of the GVF-snake model and optical flow method is feasible to calculate the volume of the LV.