Table 3.

Reproducibility metrics of normalized circumferential strain (NCS) from the analysis of six subjects by comparing results from the same reader processing the data at least six months apart (intra-observer) and by comparing results from two independent readers (inter-observer). [Abs. – absolute value, SD – standard deviation, CoV – coefficient of variation, Local Ext. – Local max/min extrema]

	Aortic	Abs. Mean	CoV	Abs. Max/Min	CoV	Abs Max/Min
	Location	Diff. (±SD)	(Mean Diff.)	Diff. (±SD)	(Max/Min)	Sector Diff.
	IAA	0.09 ± 0.06	0.11	0.07 ± 0.04	0.08	0.4
Intra-	DTA	0.15 ± 0.13	0.20	0.11 ± 0.07	0.13	0.8
Observer	DAA	0.21 ± 0.15	0.27	0.14 ± 0.17	0.20	0.3
	Mean	0.15 ± 0.11	0.19	0.10 ± 0.09	0.14	0.5
	IAA	0.12 ± 0.08	0.15	0.11 ± 0.09	0.15	0.6
Inter-	DTA	0.13 ± 0.09	0.17	0.12 ± 0.09	0.15	0.3
Observer	DAA	0.32 ± 0.21	0.39	0.31 ± 0.23	0.32	0.3
	Mean	0.19 ± 0.13	0.24	0.18 ± 0.13	0.21	0.4