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

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]

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.

ACCESS IC LAB Graduate Institute of Electronics Engineering, NTU

P. 42007/03/07

What Is Our Job?

All digital

display

B, M, Doppler image

processingDoppler

processing

digital receive beamformer

system controlkeyboard

beamformer control

digital transmit beamformer DAC

high voltage

amplifier

ADCvariable

gain

T/R switchMUX

array

body

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.

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.

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]

v

ACCESS IC LAB Graduate Institute of Electronics Engineering, NTU

P. 82007/03/07

Experimental ResultsExperimental Results

B-mode

50 100 150 200 250 300 350 400 450 500

10

20

30

40

50

60-0.4

-0.3

-0.2

-0.1

0

0.1

0.2

0.3

0.4

lateral (mm)

axia

l (m

m)

B-mode

500 1000 1500 2000 2500 3000 3500 4000

100

200

300

400

500

600

700

800

900

1000

Color Doppler

The phantom consists of agar and carbon powder. The color Doppler image depicts the velocity clearly.

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

ACCESS IC LAB Graduate Institute of Electronics Engineering, NTU

P. 102007/03/07

What You Will Learn and Deliver

Delay calculationArray controller Phase rotation

DemodLPF

PhaseRotator

ADC Delay Unit

Delay Unit

Controller

Q(t)

I(t)

I(t) Q(t)DSP Engine

Image & Doppler ProcessingBlock diagram of array beamformer.

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)

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/).

9) GE Healthcare (www.gehealthcare.com).

Reference (2/2)