题目：Radon Analysis of Ultrasonic Guided Waves Propagating in a Human Tibia（基于Radon变换的超声导波在人胫骨中传播特性研究）
时间：2015年12月11日下午14:00 地点：永利集团88304官网楼401室
邀请方：永利集团88304官网测试与信息工程系
报告内容：
Ultrasound is an indispensable imaging modality to study soft tissues in diagnostic radiology. The use of ultrasound to study hard tissues is not common but in recent years modest interest has been generated to use ultrasound to assess osteoporosis and related fractures. Quantitative guided-wave ultrasonography is promising to evaluate skeletal quality because the cortex of long bone is a strong waveguide for ultrasound and its propagation characteristics are sensitive to the thickness and elastic properties of the cortex. Using the axial transmission configuration, the signals are typically acquired by multichannel recording and contain many overlapping waveforms, which presents a challenging task to modal identification.
Current signal processing methods used to study bone data do not provide sufficient wavefield separation capability and imaging resolution to analyze multimodal signals. Based on our previous pioneering and successful application of Radon transform to process simulation and in-vitro data, we present the novel application of the Radon technique to analyze an in-vivo data set from human tibia. The results demonstrate the efficacy of the method to extract guided modes, reconstruct wavefields, and enhance imaging resolution of the dispersive guided-wave energies. The proposed method offers a robust and powerful tool to supplement the current signal processing techniques to process multichannel axially-transmitting in-vivo data for bone tissue characterization.
主讲人简历：
RESEARCH INTERESTS
Ultrasonic physics and imaging of bone tissues
Ultrasound imaging of the spine
Ultrasonic wave propagation
Signal processing/Image processing
Professional Experiences
2014 – Present Adjunct Professor, Dept. of Electrical Engineering, Fudan University, Shanghai China
2013 – Present Professor, Dept. of Radiology and Diagnostic Imaging, University of Alberta
2011 – Present Adjunct professor, Dept. of Electrical Engineering, Yunnan University, Yunnan China
2009 – Present Medical Physicist, Regional Diagnostic Imaging, Edmonton – Alberta Health Services
2009 – Present Team Leader, Authorized Radiation Protection Agency, Edmonton –
2009 – Present Medical Physicist, Diagnostic Imaging, Edmonton – Alberta Health Services
2005 – Present Adjunct Professor, Department of Biomedical Engineering, University of Alberta
1999 – Present Adjunct Professor, Department of Physics, University of Alberta