Journal of Northeastern University(Natural Science) ›› 2021, Vol. 42 ›› Issue (7): 960-965.DOI: 10.12068/j.issn.1005-3026.2021.07.008

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Double Delay Multiplication and Accumulation Beamforming Algorithm Based on Weighting Factor

BAO Xi-rong, LI Zheng-shuang, GAO Hao-sen, ZHANG Shi   

  1. School of Computer Science & Engineering, Northeastern University, Shenyang 110169, China.
  • Revised:2020-10-10 Accepted:2020-10-10 Published:2021-07-16
  • Contact: LI Zheng-shuang
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Abstract: In order to solve the problem that the double delay multiplication and accumulation algorithm in ultrasonic imaging is not suitable for high noise environments, a double delay multiplication and accumulation algorithm based on mean-standard deviation weighting factor, namely RD-DMAS algorithm, is proposed. The weighted factor has a significant effects on solving the image speckle problem caused by strong noises, and the dual delay multiplication and accumulation beamforming algorithm can greatly improve the resolution of ultrasonic imaging, so the new method can obtain high resolution and high contrast image reconstruction. The algorithm was simulated in point scattering target replicas, cyst replicas and noise environments, and the results show that the RD-DMAS has the smallest sidelobe and narrower main lobe. The contrast ratios(CR)of DAS, DMAS, DS-DMAS and RD-DMAS were 9.72, 11.72, 13.28 and 19.86, respectively. RD-DMAS provides the best imaging performance regardless of noise in the environment.

Key words: beamforming algorithm; weighting factor; delay multiplication and accumulation; ultrasonic imaging; image reconstruction

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