准静态弹性成像技术是基于组织压缩前和压缩后超声回波射频信号进行组织运动重构的弹性成像技术。提出了一种基于先验估计的自适应窗函数算法,在位移估计过程中,使用已估计的临近窗的时延值作为先验信息,自动调整截取压缩后射频信号段的截取窗函数,提高了互相关运算所需的压缩前和压缩后信号段之间的相关性。仿真实验结果表明,该算法不仅大大提高了成像速度,而且提高了信噪比较低时的成像质量,同时该算法具有更宽的应变通带。 Quasi-static elastography is an elastic imaging technique based on tissue motion reconstruction before and after compressed ultrasound echo. An adaptive window function algorithm based on priori estimation is proposed. In the process of displacement estimation, the estimated window near delay value is used as prior information to automatically adjust the interception window function of intercepted and compressed RF signal segment The correlation between pre-compression and post-compression signal segments required for cross-correlation operations. The simulation results show that this algorithm not only greatly improves the imaging speed, but also improves the image quality at low signal-to-noise ratio. At the same time, the algorithm has a wider strain passband.