Table 2.
R2*Iron-median and R2*Iron-ROI_based versus R2*CMRTools for the three cohorts of patients.
| Paired t-test | Regression Analysis | Bland Altman | CoV (%) |
||||||
|---|---|---|---|---|---|---|---|---|---|
| Mean Values (Hz) |
P | Slope | P for Slope ≠1 |
Intercept (Hz) |
R- squared |
Mean diff (Hz) |
Limits (Hz) |
||
| a) First single-center cohort: black blood images | |||||||||
|
R2*Iron-median vs R2*CMRTools |
48.9±55.0 vs 48.2±53.1 |
0.258 | 1.036±0.007 | <0.0001 | −1.007±0.473 | 0.998 | 0.7 | −5.0 to 6.5 |
4.37 |
|
R2*Iron-ROI_based vs R2*CMRTools |
48.9±52.7 vs 48.2±53.1 |
0.063 | 0.993±0.007 | 0.336 | 1.058± 0.512 | 0.998 | 0.7 | −4.1 to 5.5 |
3.66 |
| b) Second single-center cohort: bright blood images | |||||||||
|
R2*Iron-median vs R2*CMRTools |
47.7±38.2 vs 47.2±36.9 |
0.085 | 1.035±.006 | <0.0001 | −1.190±0.373 | 0.998 | 0.4 | −4.0 to 4.9 |
3.45 |
|
R2*Iron-ROI_based vs R2*CMRTools |
47.5±37.4 vs 47.2±36.9 |
0.050 | 1.013±0.004 | 0.002 | −0.245±0.247 | 0.999 | 0.4 | −2.3 to 3.0 |
2.06 |
| c) Multi-center cohort | |||||||||
|
R2*Iron-median vs R2*CMRTools |
43.7±22.4 vs 43.8±22.7 |
0.989 | 0.982±0.007 | 0.015 | 0.705±0.359 | 0.997 | −0.1 | −2.7 to 2.6 |
2.25 |
|
R2*Iron-ROI_based vs R2*CMRTools |
44.0±22.5 vs 43.8±22.7 |
0.207 | 0.989±0.007 | 0.131 | 0.681±0.352 | 0.997 | 0.2 | −2.3 to 2.7 |
2.07 |