Table II.
Statistical Comparison of Various Flows by 4-D phase contrast (n=22). Lower limit of agreement represents the mean difference −1.96 standard deviations and upper limit of agreement represents the mean difference +1.96 standard deviations
| Upper Body | Lower Body | Whole Body | Whole Body | Whole Body | Lower Body | |
|---|---|---|---|---|---|---|
| Flow A | AA- DA | IVC | SVC + IVC | SVC + IVC | AA | DAD |
| Flow B | SVC | DA | AA | PT | PT | DA |
| Pearson Correlation Coefficient | 0.89 | 0.96 | 0.97 | 0.94 | 0.97 | 0.98 |
| Paired T-test p values | 0.06 | 0.09 | 0.01 | 0.38 | 0.89 | 0.72 |
| Bland-Altman Absolute | ||||||
| Mean Difference (L/min) | −0.1 | 0.1 | 0.2 | 0.1 | −0.1 | 0 |
| Lower Limit of Agreement (L/min) | −0.5 | −0.3 | −0.3 | −0.6 | −0.6 | −0.2 |
| Upper Limit of Agreement (L/min) | 0.3 | 0.4 | 0.6 | 0.7 | 0.4 | 0.3 |
| Bland-Altman Relative | ||||||
| Mean Difference | −6% | 6% | 7% | 2% | −4% | 1% |
| Lower Limit of Agreement | −44% | −22% | −13% | −21% | −22% | −18% |
| Upper Limit of Agreement | 32% | 34% | 26% | 26% | 14% | 21% |
AA= Ascending Aorta, DA= Descending Aorta after last arch vessel, DAD= Descending Aorta just above diaphragm, PT= Pulmonary Trunk, SVC= Superior Vena Cava, IVC= Inferior Vena Cava