A new aliasing extension method for ultrasonic 2-dimensional pulsed Doppler systems.
The mean frequency aliasing problem originating from the pulse repetition frequency is one of major limitations in ultrasound pulsed Doppler systems. A conventional approach to resolving this problem is to track the mean frequencies close to and beyond the Nyquist frequency along the temporal axis. In this paper, a new concept of tracking the mean frequencies along the spatial axis is proposed for the same problem. The technique is fault tolerable and more suitable for multigate and 2-D Doppler systems than conventional methods. Simulation and experimental results show that the proposed system has improved performance compared with that of the conventional systems.
Baek
K R
KR
Department of Electrical Engineering, Korea Advanced Institute of Science & Technology, Seoul.
Bae
M H
MH
Park
S B
SB
D003198:Computer Simulation; D015150:Echocardiography, Doppler; D006801:Humans; D014465:Ultrasonics