Notice of Removal: Performance comparison of optical flow and block matching methods for strain estimation in spatial angular compounding with plane wave

Abstract

Spatial angular compounding (SAC) with plane wave has been proposed to improve the performance of motion and strain estimation at high frame rate. A previous study shows that the accuracy of 2D estimation depends on the number of steering angles, maximum steering angle, and accuracy of axial estimation at different angles (He et al, Ultrasonics 2017). We have demonstrated (Pan et al, TUFFC 2015) that optical flow (OF) with affine model obtains better axial estimation than normalized cross-correlation based block matching (BM) with rigid model. The objective of this study was to investigate whether OF combined with SAC performs better in plane wave imaging (PWI).