High Frame Rate Ultrasonic Imaging System Based-on Linear Frequency-Modulated Signal.
The high frame rate (HFR) ultrasonic imaging system, which is developed with limited diffraction beams, constructs images at a high frame rate. Because of one transmission for constructing image, the system suffers from lower signal-to-noise rate (SNR). The proposed method uses linear frequency-modulated signal (or chirp) as excited signal. For the higher time-bandwidth (TB) products available in the chirp, a compressed pulse response is obtained by passing the received signal through a related matched filter. The results show that the higher SNR of the system offered by chirp excitation gives improved image quality.
Xuemei
Han
H
Department of Electronic Science and Technology, USTC, Hefei, China. Email: hanxm@mail.ustc.edu.cn.
Hu
Peng
P
Hongwei
Du
D
Huanqing
Feng
F