On December 6, Prof. Dong C. Liu, aninternationalexpert in ultrasound imaging and signal processing at Sichuan University, was invited to give an online academic lecture for the graduate students and teachers of School of Automation.

The theme of this lecture is "Numerical Analysis of Nonlinear Acoustics and its Application to Ultrasound Tissue Characterization ". The presentation is about some works on numerical analysis of nonlinear acoustics and its new applications to liver disease detection in real-time ultrasound imaging. He showed some ways to derive a closed form of fundamental and the second harmonic signal propagating in nonlinear medium from which one can estimate the nonlinearity parameter B/A for tissue characterization. And he also presented some ways to do system calibration and verification using computer simulations, phantom tests and in vitro experiments to verify the reliability of our calculated B/A values during system implementation.

Prof.Liu’s wonderful report, truth-seeking and pragmatic scientific attitude, rigorous and pragmatic academic style deeply affected the teachers and students present. The interactive atmosphere was relaxed and warm. This lecture broadened the international vision of our teachers and students, and laid a foundation for further strengthening in-depth cooperation in related fields in the future.

Prof. Dong C. Liu‘s brief CV

Dong C. Liu, Ph.D. received his Ph.D. in Computer Sciences, 1987 and M.S. in Applied Math both from Northwestern University, IL USA. He earned his MS in Applied Math. and BS in Mathematics from Tsing Hua University, Taiwan. Dr. Liu has worked for Siemens Medical Systems, USA for 11 years as a Chief Scientist to design and develop Siemens’ premium Color Ultrasound products. Dr. Liu received 18 US patents with Siemens. In 2004, Dr. Liu joined Sichuan University and co-founded Saset Healthcare in Chengdu, a startup specializing in making high-end ultrasound machines, and he received 32 patents with Saset. Dr. Liu’s research areas are in medical signal & image processing. Dr. Liu has guided 20 PhD and 110 MS students in Sichuan U., and published more than 170 refereed papers and one of them, the L-BFGS paper as the core part of large-scale numerical optimization schemes has been cited 7850+.

International Joint Research Center of Robots and Intelligent Systems