Table 3.
Intra- and inter-observer variability of cardiac MRI tissue tracking.
| Inter−observer (n = 30) | Intra−observer (n = 30) | |||
|---|---|---|---|---|
| ICC | 95% CI | ICC | 95% CI | |
| Global | ||||
| Radial PS(%) | 0.98 | 0.95−0.99 | 0.98 | 0.97−0.99 |
| Circumferential PS(%) | 0.98 | 0.96−0.99 | 0.99 | 0.98−0.99 |
| Longitudinal PS(%) | 0.94 | 0.87−0.97 | 0.97 | 0.93−0.98 |
| Basal | ||||
| Radial PS(%) | 0.96 | 0.93−0.98 | 0.97 | 0.93−0.99 |
| Circumferential PS(%) | 0.96 | 0.88−0.99 | 0.96 | 0.92−0.98 |
| Longitudinal PS(%) | 0.90 | 0.79−0.95 | 0.93 | 0.86−0.97 |
| Mid | ||||
| Radial PS(%) | 0.96 | 0.91−0.98 | 0.96 | 0.91−0.98 |
| Circumferential PS(%) | 0.99 | 0.98−0.99 | 0.99 | 0.98−0.99 |
| Longitudinal PS(%) | 0.89 | 0.79−0.95 | 0.95 | 0.90−0.98 |
| Apical | ||||
| Radial PS(%) | 0.93 | 0.86−0.97 | 0.94 | 0.88−0.97 |
| Circumferential PS(%) | 0.97 | 0.94−0.99 | 0.98 | 0.96−0.99 |
| Longitudinal PS(%) | 0.89 | 0.78−0.94 | 0.91 | 0.82−0.96 |
Notes: ICC, intraclass correlation coefficient; CI, confidence interval; PS, peak strain; MRI, magnetic resonance imaging.