1. ACCESS IC LAB Graduate Institute of Electronics Engineering, NTU 2007/03/07 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. ACCESS IC LAB Graduate Institute of Electronics Engineering, NTU P. 22007/03/07 Ultrasonic Image  Ultrasonic imaging provides a non-invasive way for structure and velocity imaging.  High-frequency ultrasound provides high spatial resolution. [9]

3. ACCESS IC LAB Graduate Institute of Electronics Engineering, NTU P. 32007/03/07 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. ACCESS IC LAB Graduate Institute of Electronics Engineering, NTU P. 42007/03/07 What Is Our Job? All digital display B, M, Doppler image processing Doppler processing digital receive beamformer system control keyboard beamformer control digital transmit beamformer DAC high voltage amplifier ADC variable gain T/R switch MUX array body

5. ACCESS IC LAB Graduate Institute of Electronics Engineering, NTU P. 52007/03/07 Array Beamformation  Mechanical scan  Electronic scan  Real-time imaging [8] Array beamformation allows dynamic focusing that improves image quality.

6. ACCESS IC LAB Graduate Institute of Electronics Engineering, NTU P. 62007/03/07 Experimental Results (b) With digital beamforming(a) Without digital beamforming  Digital beamformer successfully completes dynamic focusing.

7. ACCESS IC LAB Graduate Institute of Electronics Engineering, NTU P. 72007/03/07 Velocity Estimation with Doppler Ultrasound  Velocity profile is significant in clinical applications.  Doppler ultrasound provides a non-invasive way for velocity measurement. [8]

8. ACCESS IC LAB Graduate Institute of Electronics Engineering, NTU P. 82007/03/07 Experimental Results  B-mode  Color Doppler  The phantom consists of agar and carbon powder.  The color Doppler image depicts the velocity clearly.

9. ACCESS IC LAB Graduate Institute of Electronics Engineering, NTU P. 92007/03/07 Project Requirements  We will focus on array beamformation.  Suggested background/courses  Digital signal processing  Digital IC design  MATLAB coding

10. ACCESS IC LAB Graduate Institute of Electronics Engineering, NTU P. 102007/03/07 What You Will Learn and Deliver  Delay calculation  Array controller  Phase rotation Demod LPF Phase Rotator ADC Delay Unit Controller Q(t) I(t) Q(t) DSP Engine Image & Doppler Processing Block diagram of array beamformer.

11. ACCESS IC LAB Graduate Institute of Electronics Engineering, NTU P. 112007/03/07 1)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. 2)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. 3)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 4)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 Reference (1/2)

12. ACCESS IC LAB Graduate Institute of Electronics Engineering, NTU P. 122007/03/07 5)Changqing Gao, Lichen Zhang, and Eddie Moon Chung Wong, “Design of a Digital Phase Shift Beamformer for Ultrasonic Imaging, ” IEEE International Workshop on Biomedical Circuits & Systems, Dec. 2004. 6) 李百祺, 台灣大學電機所 “ 醫用超音波原理 ” 課程講義 7)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 8)NTNU Faculty of Medicine > Department of Circulation and Imaging (folk.ntnu.no/stoylen/strainrate/Ultrasound/).folk.ntnu.no/stoylen/strainrate/Ultrasound/ 9)GE Healthcare (www.gehealthcare.com).www.gehealthcare.com Reference (2/2)