An ultrasonic diagnostic imaging system is operable to produce tissue Doppler images and data for diagnostic use. The system includes a visual or audible alert which alerts a user to the possibility of aliasing in the tissue Doppler image data and the need to reset the velocity scale of the color map. The visual alert may be a light on the display screen or control panel or contrasting colors to the colors of the color map in an area of the image where aliasing may be occurring. The visual alert may be a histogram displayed in alignment with the color bar of the tissue Doppler image. The indication by the histogram of image values at a velocity limit of the color bar indicates a need to adjust the color velocity scaling.

The present invention allows one to reconstruct high quality velocity waveforms using data collected at comparatively slow frame rates, such data would have otherwise resulted in non-diagnostic and non-clinically useful waveforms. The invention is directed to reconstructing a high quality "continuous" velocity waveform, and uses instantaneous measures of acceleration in addition to velocity to reconstruct such a waveform. By simultaneously detecting the velocity and acceleration of a fixed point in space, one can more faithfully reproduce the corresponding velocity waveform using significantly lower sample rates. If images are acquired, then the velocity sample rate corresponds to the image frame rate. Also, depending on the number of looks or scan lines contained in an ensemble, double interleaving of the raw data is used.