The digital veterinary B-ultrasound imaging has the incomparable advantages of simulating veterinary B-ultrasound ultrasound imaging, which is concentrated in the following aspects:
Tracking dynamic aggregation: In the digital mode, the signal entering the receiving focus system has been digitized, and in principle, the digital signal value will not be changed when the focus is changed. Therefore, only one transmission and reception can be formed to form a received sound beam, and the number of focal points can be increased at will, so that the tracking type dynamic receiving focus can be realized. Tracking dynamic receive focus enables each pixel to be received to be in focus, at least close to the focus, which greatly improves the lateral resolution of the image.
2, Dynamic apodization, digital way to achieve apodization is relatively simple. It is only necessary to multiply each of the array element signals by the amplitude coefficient required by the apodization function before the delay is added.
3. Digital detection of signals, the advantage of digital detection is that the distortion of analog detection can be reduced. For example, in the quadrature detection mode, the amplitude values of the in-phase signal components and the quadrature signal components generated by the analog detection cannot be guaranteed to be equal, and the phase is orthogonal,and digital detection can avoid these two deficiencies.