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• W2124884888 abstract "A real-time 3-D imaging system requires the development of a beamformer that can generate many beams simultaneously. In this paper, we discuss and evaluate a suitable synthetic aperture beamformer. The proposed beamformer is based on a pipelined network of high speed digital signal processors (DSP). By using simple interpolation-based beamforming, only a few calculations per pixel are required for each channel, and an entire 2-D synthetic aperture image can be formed in the time of one transmit event. The performance of this beamformer was explored using a computer simulation of the radiation pattern. The simulations were done for a full 64-element array and a sparse array with the same receive aperture but only five transmit elements. We assessed the effects of changing the sampling rate and amplitude quantization by comparing the relative levels of secondary lobes in the radiation patterns. The results show that the proposed beamformer produces a radiation pattern equivalent to a conventional beamformer using baseband demodulation, provided that the sampling rate is approximately 10 times the center frequency of the transducer (34% bandwidth pulse). The simulations also show that the sparse array is not significantly more sensitive to delay or amplitude quantization than the full array." @default.
• W2124884888 created "2016-06-24" @default.
• W2124884888 creator A5036310815 @default.
• W2124884888 creator A5062634167 @default.
• W2124884888 date "1999-07-01" @default.
• W2124884888 modified "2023-09-27" @default.
• W2124884888 title "Theoretical assessment of a synthetic aperture beamformer for real-time 3-D imaging" @default.
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• W2124884888 doi "https://doi.org/10.1109/58.775664" @default.
• W2124884888 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/18238502" @default.
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