Table 3.
Comparison of the mean net flow [ml/cycle] and peak velocity [m/sec] calculations to 2D-flow before and after performing eddy current correction (ECC) in GRAPPA- and k-t GRAPPA-accelerated 4D-flow measurements with p-values and correlation coefficients.
| Net flow [ml/cycle] | Peak velocity [m/sec] | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Without ECC | With ECC | Without ECC | With ECC | |||||||||
| 4D-flo w GRAPPA | 2D-flow | Correlation coefficient R/p-value | 4D-flow GRAPPA | 2D-flow | Correlation coefficient R/p-value | 4D-flow GRAPPA | 2D flow | Correlation coefficient R/p-value | 4D-flow GRAPPA | 2D flow | Correlation coefficient R/p-value | |
| Ascending Aorta | 80.36 (±26.25) | 87.86 (±24.26) | 0.84/<0.0001 | 83.54 (±25.03) | 87.86 (±24.26) | 0.90/<0.0001 | 1.25 (±0.34) | 1.21 (±0.28) | 0.46/<0.0001 | 1.21 (±0.29) | 1.21 (±0.28) | 0.87/<0.0001 |
| Descending Aorta | 50.01 (±20.81) | 49.58 (±18.13) | 0.77/<0.0001 | 50.26 (±17.12) | 49.58 (±18.13) | 0.85/<0.0001 | 1.15 (±0.42) | 0.95 (±048) | 0.53/<0.0001 | 1.0 (±0.34) | 0.95 (±048) | 0.89/<0.0001 |
| 4D-flow k-t GRAPPA | 2D flow | Correlation coefficient R/p-value | 4D-flow k-t GRAPPA | 2D flow | Correlation coefficient R/p-value | 4D-flow k -t GRAPPA | 2D flow | Correlation coefficient R/p-value | 4D-flow k-t GRAPPA | 2D flow | Correlation coefficient R/p-value | |
| Ascending Aorta | 87.41 (±26.01) | 87.86 (±24.26) | 0.94/<0.0001 | 88.14 (±26.21) | 87.86 (±24.26) | 0.98/ <0.0001 | 1.15 (±0.32) | 1.21 (±0.28) | 0.80/<0.0001 | 1.18 (±0.31) | 1.21 (±0.28) | 0.93/<0.0001 |
| Descending Aorta | 48.02 (±18.13) | 49.58 (±18.13) | 0.98/<0.0001 | 49.56 (±17.38) | 49.58 (±18.13) | 0.98/<0.0001 | 0.94 (±0.48) | 0.95 (±048) | 0.99/<0.0001 | 0.93 (±0.44) | 0.95 (±048) | 0.99/<0.0001 |