A Fast Doppler Ultrasound Simulator Based on RF Beamlines

To better understand the information contained in the Doppler signal and verify algorithms to be used in modern ultrasound scanners, numerical simulations governed by the scanner’s data paths are necessary as a realistic tool for further research and development. Besides the simulation of the whole data flow of Doppler signals starting from the beamforming, baseband processing to the collection of Doppler I and Q signals for spectral Doppler and color flow mapping (CFM) process, we propose a fast way to reconstruct the Doppler waveform theoretically and verify it in two circumstances. First, there exist a cluster of random scatterers around the focal point moving at a constant velocity toward the transducer array in the ideal circumstance. Second, we consider that a cluster of random scatterers around the focal point moving at different velocities toward the transducer array in the realistic environment. Finally, the Doppler signals and power spectrum can be displayed.