Table 4 Intra-observer, inter-observer and inter-study reproducibility of measurements for all subjects
Intraobserver | 1.5 T | 3 T | ||
|---|---|---|---|---|
Septal | SAX | Septal | SAX | |
Native T1 | ||||
MD ± SD (ms) | 3 ± 11 | -16 ± 23 | 3 ± 13 | -6 ± 16 |
CoV (%) | 1.1 | 2.3 | 1.2 | 1.5 |
Agreement (r) | 0.84** | 0.72** | 0.87** | 0.74** |
Post-contrast T1 | ||||
MD ± SD (ms) | 5 ± 12 | 3 ± 24 | -6 ± 15 | -3 ± 13 |
CoV (%) | 3.1 | 6.6 | 3.2 | 3.2 |
Agreement (r) | 0.78** | 0.53* | 0.79** | 0.62** |
Lambda | ||||
MD ± SD | 0.014 ± 0.009 | -0.017 ± 0.013 | 0.017 ± 0.002 | 0.019 ± 0.019 |
CoV (%) | 4.1 | 5.2 | 5.1 | 5.9 |
Agreement (r) | 0.81** | 0.69** | 0.78** | 0.61** |
Interobserver | 1.5 T | 3 T | ||
Septal | SAX | Septal | SAX | |
Native T1 | ||||
MD ± SD (ms) | -1.5 ± 19 | 2.3 ± 24 | 0.3 ± 15 | -2.9 ± 49 |
CoV (%) | 4.3 | 6.9 | 1.4 | 2.7 |
Agreement (r) | 0.89** | 0.73** | 0.93** | 0.75** |
Post-contrast T1 | ||||
MD ± SD (ms) | -6.3 ± 52 | -6.9 ± 53 | 6.2 ± 71 | -8.4 ± 79 |
CoV (%) | 4.3 | 7.1 | 2.8 | 3.3 |
Agreement (r) | 0.79** | 0.69** | 0.81** | 0.54** |
Lambda | ||||
MD ± SD | 0.013 ± 0.019 | -0.017 ± 0.002 | 0.019 ± 0.008 | 0.011 ± 0.003 |
CoV (%) | 7.2 | 7.9 | 9.1 | 11.7 |
Agreement (r) | 0.71** | 0.59** | 0.68** | 0.53** |
Interstudy | 1.5 T | 3 T | ||
Septal | SAX | Septal | SAX | |
Native T1 | ||||
MD ± SD (msec) | 2.4 ± 9.2 | 6.1 ± 21 | -1.5 ± 12 | 4.9 ± 18 |
CoV (%) | 1.2 | 4.5 | 3.6 | 8.4 |
Agreement (r) | 0.92** | 0.78** | 0.95** | 0.86** |
Post-contrast T1 | ||||
MD ± SD (ms) | -8 ± 54 | 35 ± 72 | 19 ± 65 | 31 ± 62 |
CoV (%) | 9.0 | 12 | 12 | 15 |
Agreement (r) | 0.62** | 0.45* | 0.55** | 0.41** |
Lambda | ||||
MD ± SD | 0.017 ± 0.021 | 0.021 ± 0.029 | 0.016 ± 0.018 | 0.019 ± 0.035 |
CoV (%) | 4.2 | 6.1 | 3.5 | 7.8 |
Agreement (r) | 0.79** | 0.69** | 0.82** | 0.73** |