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Improved ultrasound digital beamforming using single-bit sigma-delta modulators with band-pass decimation filters

Altinok, Gunes and Al-Janabi, Mohammed and Kale, Izzet (2011) Improved ultrasound digital beamforming using single-bit sigma-delta modulators with band-pass decimation filters. In: Proceedings of the 2011 IEEE International Symposium on Circuits and Systems (ISCAS), Rio de Janeiro, Brazil, 15-18 May 2011. IEEE, pp. 2091-2094. ISBN 9781424494736

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Official URL: http://dx.doi.org/10.1109/ISCAS.2011.5938010

Abstract

In this study, a novel hardware efficient digital ultrasound beamformer using single-bit second-order Σ-Δ modulators incorporated with band-pass decimation filters is presented. Beside the reduced size, cost and power consumption of the phased array front-end circuitry, there are significant image artifacts introduced by Σ-Δ beamformers. The elevated noise floor due to the repeated samples in dynamic focusing is greatly reduced by hardware efficient band-pass filters in the decimation stage following the beam summation. The B-scan images using experimental phantom data have shown that the proposed structure achieves significant improvements over the image resolution constructed by a conventional Σ-Δ beamformer. This novel structure ensures high quality B-scan images by preserving the hardware simplicity of the conventional single-bit Σ-Δ beamformers.

Item Type:Book Section
Research Community:University of Westminster > Electronics and Computer Science, School of
ID Code:10284
Deposited On:02 Feb 2012 15:41
Last Modified:02 Feb 2012 15:41

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