A Transient Elastography System for Soft-tissue Stiffness Measurement and Wavelet De-noising of Displacement Estimation in Elastogram
Elastography is an emerging ultrasonic imagingtechnique. A system based on transient elastography is built tomeasure biological tissues stiffness in the paper. Then, waveletde-noising of the displacement estimatation to reduce artifactsdue to high overlap in transient elastography is presented. Highoverlap between data segments is essential to improve axialresolution in transient elastography. However, overlap more than90% or more causes the increase of correlated errors, which inturn generate worm artifact in strain. Wavelet de-noising canreduce errors in the displacement estimates strikingly bythresholding the wavelet coefficients, therefore reducing theworm artifact. The strain results from tissue-mimickingphantoms, illustrates the improvement in the elastogram bywavelet de-noising algorithm.
Chen Xu Hui Yao Tao Ling Hairong Zheng
Paul C·Lauterbur Research Center for Biomedical Imaging, Institute of Biomedical and Health Engineering, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences Shenzhen, China Key Laboratory of Biomedical informatics and Health Engineerin
国际会议
成都
英文
1-4
2010-06-18（万方平台首次上网日期，不代表论文的发表时间）