Title :
Code Compression after Demodulation in Ultrasound Flow Imaging Systems
Author :
Zhao, Heng ; Liu, Kai ; Gao, Shangkai
Author_Institution :
Dept. of Biomed. Eng., Tsinghua Univ., Beijing
Abstract :
In this paper, an ultrasound flow imaging system with single-transmit coded excitation is studied. With the oversampled code sequence modulated by base code, code compression before or after demodulation is demonstrated to be equivalent. A coded excitation flow imaging system with relatively low analog-to-digital (AD) sampling rate is proposed. The performance of the system is evaluated by simulation results
Keywords :
biomedical equipment; biomedical ultrasonics; codes; demodulation; flow visualisation; haemodynamics; base code; code compression; coded excitation flow imaging system; demodulation; low analog-to-digital sampling rate; single-transmit coded excitation; ultrasound flow imaging systems; Biomedical imaging; Blood flow; Decoding; Demodulation; Frequency modulation; High-resolution imaging; Image resolution; Modulation coding; Radio frequency; 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.2005.1616228
