Beaforming Algorithm Based on Minimum Variance Delay Multiplication and Sum for Medical Ultrasound

doi:10.12068/j.issn.1005-3026.2018.04.004

Abstract

Abstract: Based on the characteristics of high correlation of ultrasonic echo signals， a minimum variance delay multiplication and sum beamforming(MVDMAS) algorithm was proposed. Firstly， according to the main idea of minimum variance beamforming， the weights of the received echo signals were calculated to decrease the side lobe level of echo signal. Then， the multiplication and sum operation was used for the weighted echo signals to reduce the correlation of the echo signals. Finally， the mathematical theory derivation and computer simulation verify the effectiveness of the proposed algorithm. Simulation results showed that the image contrast and resolution of the proposed algorithm are improved to some extent. The main lobe width， side lobe height， and speckle noise are reduced effectively. Compared with delay and sum (DAS)， minimum variance (MV)， and delay multiplication and sum (DMAS) beamforming， the comprehensive evaluation index contrast ratio (CR) and contrast noise ratio (CNR) are improved by 100.24%， 33.91%， 17.41% and 30.61%， 17.55%， 11.36%， respectively.

Key words: ultrasound imaging, beamforming, minimum variance, delay multiplication and sum, adaptive

CLC Number:

O426.9

SU Ting， YAO Ding-jie， LI Da-yu， ZHANG Shi. Beaforming Algorithm Based on Minimum Variance Delay Multiplication and Sum for Medical Ultrasound[J]. Journal of Northeastern University Natural Science, 2018, 39(4): 473-477.

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