대한의용생체공학회:의공학회지 (Journal of Biomedical Engineering Research)

  • 제28권6호
  • /
  • Pages.803-810
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  • 2007
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  • 1229-0807(pISSN)
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  • 2288-9396(eISSN)
대한의용생체공학회 (The Korean Society of Medical and Biological Engineering)
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동시 다중 주사 방식의 초음파 합성구경 빔포머 구조

Ultrasound Synthetic Aperture Beamformer Architecture Based on the Simultaneous Multi-scanning Approach

  • Lee, Yu-Hwa (Department of Electronic Engineering, Sogang University) ;
  • Kim, Seung-Soo (Department of Electronic Engineering, Sogang University) ;
  • Ahn, Young-Bok (Department of Electronic Engineering, Konkuk University) ;
  • Song, Tai-Kyong (Department of Electronic Engineering, Sogang University)
  • 발행 : 2007.12.31
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초록

Although synthetic aperture focusing techniques can improve the spatial resolution of ultrasound imaging, they have not been employed in a commercial product because they require a real-time N-channel beamformer with a tremendously increased hardware complexity for simultaneous beamforming along M multiple lines. In this paper, a hardware-efficient beamformer architecture for synthetic aperture focusing is presented. In contrast to the straightforward design using NM delay calculators, the proposed method utilizes only M delay calculators by sharing the same values among the focusing delays which should be calculated at the same time between the N channels for all imaging points along the M scan lines. In general, synthetic aperture beamforming requires M 2-port memories. In the proposed beamformer, the input data for each channel is first upsampled with a 4-fold interpolator and each polyphase component of the interpolator output is stored into a 2-port memory separately, requiring 4M 2-port memories for each channel. By properly limiting the area formed with the synthetic aperture focusing, the input memory buffer can be implemented with only 4 2-port memories and one short multi-port memory.

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참고문헌

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