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大學部專題報告 DSP Engine Design for Ultrasonic Digital Beamforming

大學部專題報告 DSP Engine Design for Ultrasonic Digital Beamforming. Presenter: Sniper ( 俞子豪 ) Advisor: Prof. Andy Wu Date: 2007/03/07. Ultrasonic Image. Ultrasonic imaging provides a non-invasive way for structure and velocity imaging. High-frequency ultrasound provides high spatial resolution.

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大學部專題報告 DSP Engine Design for Ultrasonic Digital Beamforming

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  1. 大學部專題報告DSP Engine Design for Ultrasonic Digital Beamforming Presenter: Sniper (俞子豪) Advisor: Prof. Andy Wu Date: 2007/03/07

  2. Ultrasonic Image • Ultrasonic imaging provides a non-invasive way for structure and velocity imaging. • High-frequency ultrasound provides high spatial resolution. [9]

  3. 無線醫學超音波膠囊計畫 Ultrasound Endoscopy Capsule (94/8 ~ 97/07) • Small area. • Low power. • High data-rate.

  4. high voltage amplifier digital transmit beamformer DAC T/R switch MUX array body system control beamformer control keyboard B, M, Doppler image processing digital receive beamformer variable gain ADC display Doppler processing All digital What Is Our Job?

  5. Array Beamformation • Mechanical scan • Electronic scan • Real-time imaging [8] Array beamformation allows dynamic focusing that improves image quality.

  6. Experimental Results (a) Without digital beamforming (b) With digital beamforming • Digital beamformer successfully completes dynamic focusing.

  7. Velocity Estimation with Doppler Ultrasound • Velocity profile is significant in clinical applications. • Doppler ultrasound provides a non-invasive way for velocity measurement. [8]

  8. Experimental Results • Color Doppler • B-mode • The phantom consists of agar and carbon powder. • The color Doppler image depicts the velocity clearly.

  9. Project Requirements • We will focus on array beamformation. • Suggested background/courses • Digital signal processing • Digital IC design • MATLAB coding

  10. I(t) Delay Unit Phase Rotator Demod LPF ADC Delay Unit Q(t) Controller I(t) Q(t) DSP Engine Image & Doppler Processing Block diagram of array beamformer. What You Will Learn and Deliver • Delay calculation • Array controller • Phase rotation

  11. Reference (1/2) • A. Kassem, J. Wang, A. Khouas, M. Sawan and M. Boukadoum, “Pipelined Sampled-Delay Focusing CMOS Implementation for Ultrasonic Digital Beamforming, ” Proceedings of The 3rd IEEE International Workshop on System-on-Chip for Real-Time Applications, pp. 247-250, July 2003. • A. Kassem, M. Sawan, M. Boukadoum, and A. Haidar, “Perception SoC Based on an Ultrasonic Array of Sensors: Efficient DSP Core Implementation and Subsequent Experimental Results, “ EURASIP Journal on Applied Signal Processing, pp. 1071-1081 , 2005. • Chang-Hong Hu, Xiao-Chen Xu, Jonathan M. Cannata, Jesse T. Yen, and K. Kirk Shung, “Development of a Real-Time, High-Frequency Ultrasound Digital Beamformer for High-Frequency Linear Array Transducers, “IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, Vol. 53, pp. 317-323, Feb. 2006 • Chang-Hong Hu, Kevin A. Snook, Pei-Jie Cao, and K. Kirk Shung, “High-Frequency Ultrasound Annular Array Imaging. Part II: Digital Beamformer Design and Imaging, “IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, Vol. 53, pp. 309-316, Feb. 2006

  12. Reference (2/2) • ChangqingGao, Lichen Zhang, and EddieMoon Chung Wong, “Design of a Digital Phase Shift Beamformer for Ultrasonic Imaging, ” IEEE International Workshop on Biomedical Circuits& Systems, Dec.2004. • 李百祺, 台灣大學電機所 “醫用超音波原理” 課程講義 • C. H. Lin, A. Y. Wu, “Mixed-scaling-rotation CORDIC (MSR-CORDIC) algorithm and architecture for high-performance vector rotational DSP applications,” IEEE Trans. Circuits and Systems Part-I: Fundamental • NTNU Faculty of Medicine > Department of Circulation and Imaging (folk.ntnu.no/stoylen/strainrate/Ultrasound/). • GE Healthcare (www.gehealthcare.com).

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