Table 3.
Summary of agreement estimates for quantitative vascular measurements
| Cross-sectional Vessel Diameter | mDixon Mean (SD) |
bSSFP Mean (SD) |
Bias (95% CI) |
Lower LOA (95% CI) |
Upper LOA (95% CI) |
|---|---|---|---|---|---|
| Aortic Root (mm) | 29.4 (9.4) | 29.6 (8.8) |
0.09 (−0.58; 0.76) |
−2.87 (−4.03; −1.71) |
3.05 (1.89; 4.21) |
| Ascending Aorta (mm) | 27.0 (8.9) | 26.0 (9.8) |
−0.22 (−1.02; 0.59) |
−3.86 (−5.25; − 2.47) |
3.42 (2.03; 4.82) |
| Main Pulmonary Artery/Conduit (mm) | 22.6 (6.5) | 22.0 (6.6) |
−0.20 (−1.18; 0.78) |
− 4.30 (−6.00; − 2.09) |
3.9 (2.20; 5.60) |
| Left Pulmonary Artery (mm) | 15.6 (4.4) | 16.2 (5.1) |
0.95 (− 0.18; 2.09) |
−4.05 (− 6.02; − 2.09) |
5.96 (3.99; 7.93) |
| Right Pulmonary Artery (mm) | 15.3 (4.0) | 15.3 (4.2) |
− 0.09 (− 0.93; 0.76) |
− 3.91 (− 5.38; − 2.45) |
3.74 (2.27; 5.20) |
| Descending Aorta (isthmus) (mm) | 16.7 (4.8) | 16.5 (4.8) |
−0.32 (− 0.92; 0.28) |
−2.98 (− 4.03; − 1.94) |
2.35 (1.30; 3.39) |
| Left Anterior Descending Coronary Artery (mm) | 3.8 (0.9) | 3.8 (0.8) |
0.03 (− 0.19; 0.24) |
− 0.84 (− 1.21; − 0.47) |
0.90 (0.52; 1.27) |
| Superior Vena Cava (mm) | 16.4 (4.1) | 15.9 (4.7) |
−0.48 (− 1.00; 0.04) |
−2.83 (− 3.73; − 1.93) |
1.88 (0.98; 2.78) |
Abbreviations: mDixon modified-Dixon; bSSFP balanced steady state free precision; SD standard deviation, CI confidence interval, LOA limit of agreement
Bias reflects mean difference for bSSFP - mDixon. LOA calculated as 1.96 x SD