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Appl. Sci. 2016, 6(11), 359;

A Sibelobe Suppressing Beamformer for Coherent Plane Wave Compounding

Department of Electronic Engineering, Fudan University, Shanghai 200433, China
Key Laboratory of Medical Imaging Computing and Computer Assisted Intervention of Shanghai, Fudan University, Shanghai 200433, China
Author to whom correspondence should be addressed.
Academic Editor: Kohji Masuda
Received: 8 September 2016 / Revised: 31 October 2016 / Accepted: 11 November 2016 / Published: 17 November 2016
(This article belongs to the Special Issue Biomedical Ultrasound)
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Contrast degradation is a critical problem in ultrasound plane wave imaging (PWI) resulting from signals leakage from the sidelobes. An ideal sidelobe reduction method may enhance the contrast without remarkably increasing computational load. To this end, we introduce a new singular value decomposition (SVD) sidelobe reduction beamformer for coherent plane wave compounding (CPWC) based on a previous work. The SVD takes advantage of the benefits of the different features of the mainlobe and sibelobe in terms of spatio-angular coherence and removes the sidelobes before the final coherent summation. This SVD-based method provides a three-dimensional approach (2D in the space and 1D in the angle) while the computation load is kept satisfactory by a dimension-reduced operation before the SVD. To directly observe the sidelobe level, we demonstrate the performance of our SVD method with a point spread function (PSF) simulation. Compared to CPWC, our method shows a 6.2 dB reduction in the peak sidelobe level (PSL). We also applied our method to the anechoic cyst inside the speckle for the imaging contrast. Both in the simulation and phantom studies, our method enhances the contrast-to-noise ratio (CNR) by more than 10%. Therefore, this new beamformer can be an efficient way to suppress sidelobes in PWI. View Full-Text
Keywords: sidelobe reduction; beamformer; coherence; singular value decomposition; low complexity sidelobe reduction; beamformer; coherence; singular value decomposition; low complexity

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Guo, W.; Wang, Y.; Yu, J. A Sibelobe Suppressing Beamformer for Coherent Plane Wave Compounding. Appl. Sci. 2016, 6, 359.

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