2010全国生物材料大会论文集之 (435).pdf

Match Filter design for Improved Strain
Estimation in Transient Elastography
Hui Yao, Tao Ling, Chen Xu, and Hairong Zheng
Paul C. Lauterbur Research Center for Biomedical Imaging
Institute of Biomedical and Health Engineering
Shenzhen Institutes of Advanced Technology
Chinese Academy of Sciences, Shenzhen 518067
Email: hr.******@siat.,hui.******@.
Abstract--Ultrasonic transient elastography for tissue DENMARK). Because of the irregular shape of
biomechanical parameters (such as shear velocity) human body, this kind of reflection mode can
measurement has significant clinical applications. The solve the limitation of transmit mode. The
Youngs modulus, which represent the tissue stiffness, is frequency and amplitude of the vibration emitted
a recognized indicator of many diseases such as liver from the vibrator is 50 Hz and 1 mm, the shear
fibrosis, breast cancer, can be directly calculated from wave generated by the vibration propagates inside
the shear velocity. In order to estimate the shear velocity soft tissues with speed between 1 m/s to 10 m/s.
accurately, transient elastography usually requires a high
Ultrasound signals are collected by a dedicated
signal to Noise ratio (SNR) in the region of interest
(ROI). We designed a match filter to convolute with the ultrasound board and recorded into the PC for data
estimated displa