Method | RV strain /strain rate | Intra-observer (n = 30) | Inter-observer (n = 30) | ||
---|---|---|---|---|---|
Bias (limits of agreement) | CV (%) | Bias (limits of agreement) | CV (%) | ||
Fast strain approach | Fast GLS, % | − 0.1 (− 1.6, 1.4) | 2.9 | − 0.3 (− 2.3, 1.8) | 3.9 |
Fast GLSRs, 1/s | − 0.04 (− 0.20, 0.12) | 6.3 | − 0.03 (− 0.22, 0.17) | 7.0 | |
Fast GLSRe, 1/s | − 0.02 (− 0.23, 0.20) | 6.5 | − 0.03 (− 0.30, 0.23) | 8.1 | |
Fast GLSRa, 1/s | − 0.03 (− 0.21, 0.15) | 7.5 | − 0.03 (− 0.27, 0.20) | 9.6 | |
Feature tracking approach | GLS, % | − 0.2 (− 4.3, 3.9) | 6.0 | − 0.1 (− 5.3, 5.1) | 7.5 |
GLSRs, 1/s | − 0.02 (− 0.33, 0.29) | 9.3 | − 0.02 (− 0.36, 0.32) | 10.1 | |
GLSRe, 1/s | 0.10 (− 0.23, 0.43) | 12.1 | 0.04 (− 0.40, 0.47) | 13.3 | |
GLSRa, 1/s | − 0.06 (− 0.37, 0.25) | 12.9 | − 0.04 (− 0.40, 0.32) | 14.4 |