Abstract：In view of the problem that the traditional time-domain cross-correlation algorithm of
ultrasound elastography in estimating tissue displacement compute-intensive and inefficient, this paper
proposed a hybrid method of ultrasound elastography based on phase zero estimation and optical flow
method. Firstly, the zero phase was used to estimation method to obtain coarse displacement field, as
a result of the initial displacement for optical flow; then the classical optical flow method Horn & Schunck
(HS) optical flow method was used to correct for the displacement field; finally the least squares method was
used to calculate the displacement field obtained axial strain organizations. In this paper, the simulation
data algorithm was validated and the impact of simulation data under different compression on the
experimental results was discussed. The experimental results showed that the longitudinal displacement
diagram and the longitudinal strain map of the zero-phase and the optical flow method proposed in this
paper were consistent with the finite element results, and the correctness of the algorithm was proved.
李元瑞，张勇德. 基于零相位与光流法的混合超声弹性成像算法的研究[J]. 中国医疗设备, 2017, 32(6): 61-65.
LI Yuan-rui, ZHANG Yong-de. Research on Hybrid Ultrasonic Elastography Algorithm Based on Zero
Phase and Optical Flow. China Medical Devices, 2017, 32(6): 61-65.
