Artifacts in two-dimensional shear wave elastography of liver

Table 5 Standard deviation and stability index of the elastograms with different area artifacts for two operators

	SD of EMAs (kPa)	SD of ELAs (kPa)	P1 value	SI of EMAs	SI of ELAs	P2 value
Expert	1.2 ± 1.2	0.8 ± 0.6	< 0.001	92% ± 12%	95% ± 5%	0.135
Novice	2.1 ± 1.7	1.1 ± 1.1	< 0.001	89% ± 8%	93% ± 6%	0.002

¹Compare the standard deviation values of elastograms with the most artifacts (EMAs) and elastograms with the least artifacts (ELAs).

²Compare the stability index values of EMAs and ELAs.

SD: Standard deviation; SI: Stability index; EMAs: Elastograms with the most artifacts; ELAs: Elastograms with the least artifacts.