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研究从B超二维回声图检测组织运动的时域分析方法，比较了4种匹配函数的性能特点．方法：通过对二维B超序列心动图的计算机处理和超声水槽模型实验，观察图像帧间相关性．结果：从跟踪精度和运算速度等方面比较，均方差匹配函数性能优于其它匹配函数．结论：使用均方差匹配函数和塔形数据结构的时域方法跟踪组织运动速度是可行的，方向分辨率优于频域法．
The time-domain analysis method of tissue motion detected by B-dimensional two-dimensional echocardiography was studied, and the performance characteristics of four matching functions were compared. Methods: Through the computer processing of the two-dimensional B-sequence echocardiography and the ultrasonic tank model experiment, the inter-frame correlation was observed. Results: Compared with other matching functions, the performance of mean square error matching function is better than that of other matching functions in terms of tracking accuracy and computing speed. CONCLUSION: It is feasible to track the velocity of tissue using time-domain method with mean-squared error matching function and tower data structure. The directional resolution is better than frequency domain method.