Delay Multiply and Sum Beamforming Algorithm Based on Virtual Source

doi:10.12068/j.issn.1005-3026.2023.04.002

Abstract

Abstract: In order to improve the imaging resolution in ultrasonic sequential beamforming based on virtual source， a delay multiply and sum beamforming algorithm based on virtual source， namely VS-DMAS algorithm， is proposed. The algorithm introduces the idea of DMAS into the second stage of sequential beamforming based on virtual source， taking advantage of the characteristics of multiplication coupling operation in DMAS algorithm， with the consideration of the coherence between signals， in order to suppress the generation of artifacts in low echo areas and improve the resolution and contrast of ultrasonic imaging. The point target phantom simulation and entity data imaging experiment are carried out. The results show that compared with the conventional focusing method， VS-DMAS algorithm has lower side lobe and narrower main lobe and can better separate the point target from the background noise， with the increase of depth as well as a higher imaging resolution. And with the appropriate increase of p value in the algorithm， the imaging resolution and contrast are improved to a certain extent.

Key words: beamforming algorithm; virtual source; delay multiply and sum; ultrasonic imaging; image reconstruction

CLC Number:

TN911.7

WANG Bao-yu， LIU Rui-lin， ZHANG Miao， ZHANG Shi. Delay Multiply and Sum Beamforming Algorithm Based on Virtual Source[J]. Journal of Northeastern University(Natural Science), 2023, 44(4): 469-475.

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