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 |