Plane Wave Ultrasonic Imaging Based on Improved Coherence Factor Delay Multiplication and Sum

Aiming at the high correlation characteristics of ultrasound echo signals, a delay multiplication and sum beamforming algorithm based on improved coherence factor(pCF-DMAS) is proposed and applied to plane wave ultrasound imaging. The algorithm calculates the weight of the echo signal by enhancing the coherence of the coherence factor, and then performs multiplication and sum operations. By using Field II to perform simulation experiments on ultrasound point targets and cyst targets, the imaging results are analyzed to verify the effectiveness of the algorithm. The simulation results show that the algorithm has excellent laterally resolution, and has the highest contrast when p is 0. 7. With the imaging effects of point targets and cyst targets considered, the optimal p value of the algorithm is proposed to be 0. 3. Compared with the delay stacking and delay multiplication and sum beamforming algorithms, the CR of the image is increased by 12. 559, 9. 602 dB, respectively. © 2022 Northeastern University. All rights reserved.