Viscoelasticity measured by shear wave elastography in a rat model of nonalcoholic fatty liver disease: comparison with dynamic mechanical analysis

Table 2 Mean viscoelasticity parameters of all rat livers measured by SWE and DMA methods

Degree of liver	n	SWE		DMA
Steatosis	n	Elasticity (kPa)	Viscosity (Pa*s)	Elasticity (kPa)	Viscosity (Pa*s)
S0	17	0.86 ± 0.27(*)	0.77 ± 0.15(**)	1.12 ± 0.21	5.40 ± 0.78
S1	14	0.93 ± 0.23(**)	0.76 ± 0.20(**)	1.25 ± 0.26	5.77 ± 0.71
S2	19	1.05 ± 0.29(**)	0.79 ± 0.14(**)	1.39 ± 0.31	6.27 ± 0.96
S3	12	1.01 ± 0.20(**)	0.75 ± 0.10(**)	1.29 ± 0.18	5.97 ± 0.68
S4	7	0.90 ± 0.24(**)	0.92 ± 0.18(**)	1.31 ± 0.14	6.20 ± 0.54

n represents the number of rats. In SWE, 10 points in each rat liver were measured in vivo, and 3 liver samples were extracted in random from each rat in DMA, values are the mean ± standard deviation. () represents the p value for each of \(\mu\) and\(\eta\), between the two types of measurements in each degree of steatosis. *p < 0.05, **p < 0.01.

ISSN: 1475-925X