线性调频信号用于高帧率超声成像系统能实现快速成像,并能显著提高成像系统的信噪比,但回波信号通过匹配滤波器后,输出压缩脉冲的旁瓣会引起较小目标的丢失。我们对基于线性调频信号的高帧率超声成像系统进行改进。采用预失真的线性调频信号作为激励信号,在接收端对接收信号通过失配滤波器处理。结果表明基于线性调频信号的高帧率超声成像系统经过改进之后,在提高系统信噪比的同时也能提高轴向分辨率。 Chirping signals for high frame rate ultrasound imaging systems enable fast imaging and can significantly improve the signal to noise ratio of the imaging system, but outputting side lobes of compression pulses after the echo signal passes through the matched filter can result in the loss of smaller targets . We made improvements to high-frame-rate ultrasound imaging systems based on chirp signals. The predistorted linear FM signal is used as the excitation signal, and the received signal is processed at the receiving end by the mismatch filter. The results show that the improved high frame rate ultrasound imaging system based on chirp signals can improve the axial resolution while improving the signal to noise ratio of the system.