In our proposed method for measurement of small tissue motion, the interval of frames between which the phase shift of echoes is estimated can be increased as described in [47] if the number of computations are desired to be reduced. However, aliasing does not occur because the large global motion is tracked (compensated) by the conventional method at a high frame rate of 286 Hz. The global motion between 2 key frames is the distance corresponding to an interval of sampled points, 19.25 μm in this study (speed of sound: 1,540 m/s). Therefore, the residual displacements at other radial positions...