An accurate method of ultrasonic strain estimation under slight tissue compression

In Ultrasound elastography, the decorrelation effect of the tissue under slightly amount of compression (less than 1%) is mainly caused by nonlinear tissue deformation, therefore the image noise caused by decorrelation is system-independent, which also becomes the major constraints for strain estimation and imaging. In this paper, one-dimensional adaptive extension method in time domain and amplitude correction method are proposed to improve signal coincidence degree, thus we get the maximum cross-correlation coefficient and finally improve the accuracy of time delay estimation and the quality of elastography.