A Preprocess Method of External Disturbance Suppression for Carotid Wall Motion Estimation Using Local Phase and Orientation of B-Mode Ultrasound Sequences

Table 2

Normalized root-mean-square error of estimated wall motions based on the speckle-tracking method vs. reference wall motion.

	REF	BM	PM	SBM	SPM	SWBM	SWOM	SWPM	SWPOM
RMSE	0.5007	0.7360	4.7382	0.8622	1.9040	0.7668	0.6471	0.6300	0.5359

REF denotes the result obtained from aligned images based on preset disturbance.