NDLI: Multi-bit sigma-delta beamformer with minimal dynamic focusing artifacts

Content Provider	IEEE Xplore Digital Library
Author	Jia Hao Cheong Lam, Y.Y.H. Liang Mong Koh Kei Tee Tiew
Copyright Year	2008
Description	Author affiliation: Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore (Jia Hao Cheong; Lam, Y.Y.H.; Liang Mong Koh; Kei Tee Tiew)
Abstract	Sigma-delta beamformer (SDBF) was proposed in recent year to increase the integration level of an ultrasound imaging system. However, the hardware efficient post-delay reconstruction structure suffers from artifact problem when dynamic focusing is applied. A sigma-delta beamformer based on cascaded reconstruction has successfully corrected the artifact problem by reducing the pre-delay quantization noise level. Based on the same principle, we developed a multi-bit SDBF. The multi-bit SDBF provides comparable image quality as the pre-delay reconstruction SDBF without any extra artifact correction processing. It also reduces the operation frequency as well as the power compared to the single-bit SDBF. Real point and cyst phantom images are presented to compare the performance of the proposed beamformer with other existing techniques. Synthesis results shows that the proposed beamformer can save up to 78% of the power consumed by pre-delay reconstruction SDBF.
Starting Page	1
Ending Page	4
File Size	462862
Page Count	4
File Format	PDF
ISBN	9781424425396
DOI	10.1109/EDSSC.2008.4760663
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-12-08
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Delta-sigma modulation Image reconstruction Focusing Ultrasonic imaging Hardware Quantization Noise level Image quality Frequency Imaging phantoms
Content Type	Text
Resource Type	Article

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