Improvement on High Frame Rate Ultrasonic Imaging System Based-on Linear Frequency-modulated Signal
The high frame rate (HFR) ultrasonic imaging system based on linear frequency-modulated (LFM) signal constructs images at a high frame rate and the signal-to-noise rate (SNR) of this system can also be improved. Unfortunately, such pulse compression methods that increase the SNR usually cause range sidelobe artifacts. In an imaging situation, the effects of the sidelobes extending on either side of the compressed pulse will be self-noise along the axial direction and masking of weaker echoes. The improvement on high frame rate ultrasonic imaging system based on LFM signal is considered in this paper. In this proposed scheme, a predistorted LFM signal is used as excited signal and an mismatched filter is applied on receive. The results show that the proposed HFR ultrasonic imaging system can achieve higher SNR and the axial resolution is also improved.
High frame rate Predistorted linear frequency-modulated signal Mismatched filter
HAN Xue-mei PENG Hu LI Xiao-xia CAI Bo
School of Information Engineering Southwest University of Science& Technology， Mianyang, 621010, Chi Department of Electronic Science and Technology, USTC, Hefei, 230026, China
国际会议
上海
英文
2115-2118
2008-05-16（万方平台首次上网日期，不代表论文的发表时间）