A New Time Delay Estimation Method for Displacement Estimation in Ultrasound Elastography
Ultrasound Elastography (UE) is a non-invasive technique to image the elasticity distribution of the soft tissues.In UE two ultrasound RF signals obtained before and after applying a compressing load on the tissue are processed for local time delay estimation (TDE) between them.To increase the accuracy of the TDE,it is necessary to use a sub-sample TDE method.In this paper a new TDE method based on the SSDspline TDE is presented which not only directly produces continuous time delay estimates from the sampled data but also provides a higher rate of accuracy in final elastograms by compensating for the decorrelation of the post-compression RF signals due to the applied compression.Moreover,a two-stage procedure is proposed to reduce the processing time.The experimental results show the proposed algorithm outperforms the golden TDE method of SSD with cubic spline fitting sub-sample TDE technique in terms of the SNRe and CNRe.
A.Khadem S.Kamaledin.Setarehdan
Control and Intelligent Processing Center of Excellence,Faculty of Electrical and ComputerEngineerin Control and Intelligent Processing Center of Excellence,Faculty of Electrical and Computer Engineeri
国际会议
9th International Conference on Signal Processing(第九届国际信号处理学术会议)(ICSP08)
北京
英文
2008-10-26（万方平台首次上网日期，不代表论文的发表时间）