Title :
High Frame Rate Ultrasonic Imaging System Based-on Linear Frequency-Modulated Signal
Author :
Xuemei, Han ; Hu, Peng ; Du Hongwei ; Huanqing, Feng
Author_Institution :
Dept. of Electron. Sci. & Tech., Univ. of Sci. & Technol. of China, Hefei
Abstract :
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
Keywords :
biomedical ultrasonics; chirp modulation; matched filters; medical image processing; chirp excitation; compressed pulse response; high frame rate ultrasonic imaging system; high time-bandwidth products; limited diffraction beams; linear frequency-modulated signal; matched filter; signal-to-noise rate; Acoustic scattering; Acoustic transducers; Biomedical transducers; Chirp; Diffraction; Frequency; Radar scattering; Scattering parameters; Ultrasonic imaging; Ultrasonic transducers; High frame rate; Linear frequency-modulated signal; Plane wave; Ultrasonic imaging;
Conference_Titel :
Engineering in Medicine and Biology Society, 2005. IEEE-EMBS 2005. 27th Annual International Conference of the
Conference_Location :
Shanghai
Print_ISBN :
0-7803-8741-4
DOI :
10.1109/IEMBS.2005.1616774
