Shear wave elasticity imaging for residual endoleak and thrombus characterisation after endoleak embolisation following endovascular aneurysm repair: a canine animal study

European Radiology Experimental

Table 2 Tukey comparisons of the mechanical properties of the regions of interest at sacrifice at three or six months

Comparison of elasticity values	kPa (mean ± standard deviation)	p value
Endoleak vs fresh thrombus	0.2 ± 0.1 vs 9.5 ± 3.3	< 0.001
Endoleak vs organised thrombus	0.2 ± 0.1 vs 48.1 ± 21.3	< 0.001
Endoleak vs agents	0.2 ± 0.1 vs 44.9 ± 23.7	< 0.001
Fresh thrombus vs organised thrombus	9.5 ± 3.3 vs 48.1 ± 21.3	< 0.001
Fresh thrombus vs agents	9.5 ± 3.3 vs 44.9 ± 23.7	< 0.001
Organised thrombus vs agents	48.1 ± 21.3 vs 44.9 ± 23.7	1.000

Note: all elasticity values were compared on animal sacrificed at three months (n = 5) or six months (n = 3). Values were log-transformed to better meet normality assumptions. Comparisons were significant overall in the ANOVA results (p < 0.001), there was no influence of the time at sacrifice (three or six months) on elasticity values (p = 0.275) and type of gel (Chi or Chi-STS; p = 0.713)