Table 2:
Intra-scan repeatability and inter-scan reproducibility of coronary flow velocity metrics using proposed triggered GA scheme with shifted binning.
| Intra-Scan Repeatability (n=8) | Inter-Scan Reproducibility (n=15) | |||||||
|---|---|---|---|---|---|---|---|---|
| First Scan | Repeat | ICC | P | First Scan | Repeat | ICC | P | |
| PSV max (cm/s) | 11.8 ± 9.8 | 13.6 ± 7.7 | 0.92 | <0.01 | 13.1 ± 8.0 | 12.6 ± 8.0 | 0.88 | <0.01 |
| TSV max (ms) | 79.7 ± 76.9 | 53.0 ± 10.8 | −0.11 | 0.609 | 89.4 ± 62.9 | 89.6 ± 65.8 | 0.52 | 0.018 |
| PDV max (cm/s) | 22.3 ± 5.7 | 21.6 ± 5.4 | 0.98 | <0.01 | 20.3 ± 5.6 | 20.9 ± 5.8 | 0.81 | <0.01 |
| TDV max (ms) | 394.8 ± 35.7 | 398.6 ± 29.5 | 0.35 | 0.164 | 412.6 ± 45.9 | 437.7 ± 98.5 | 0.41 | 0.054 |
| PSV mean (cm/s) | 8.9 ± 7.2 | 9.5 ± 7.2 | 0.99 | <0.01 | 9.4 ± 6.1 | 8.5 ± 6.8 | 0.84 | <0.01 |
| TSV mean (ms) | 84.7 ± 66.5 | 53.0 ± 10.8 | −0.12 | 0.619 | 83.9 ± 51.6 | 77.5 ± 43.8 | 0.66 | <0.01 |
| PDV mean (cm/s) | 15.3 ± 4.8 | 15.2 ± 4.7 | 0.99 | <0.01 | 14.2 ± 4.3 | 14.4 ± 4.5 | 0.78 | <0.01 |
| TDV mean (ms) | 400.0 ± 35.0 | 393.5 ± 25.0 | 0.33 | 0.176 | 416.7 ± 45.9 | 440.4 ± 95.2 | 0.36 | 0.079 |
| flow (ml/cycle) | 0.65 ± 0.29 | 0.65 ± 0.29 | 0.98 | <0.01 | 0.64 ± 0.24 | 0.58 ± 0.24 | 0.86 | <0.01 |
| flow rate (ml/min) | 48.0 ± 22.6 | 48.2 ± 21.5 | 0.99 | <0.01 | 44.0 ± 18.2 | 40.6 ± 18.8 | 0.91 | <0.01 |
| area (mm2) | 12.2 ± 3.7 | 12.2 ± 4.1 | 0.97 | <0.01 | 11.7 ± 3.5 | 11.1 ± 3.1 | 0.85 | <0.01 |
Flow velocity metrics are in mean ± standard deviation.
Abbreviations: PSV = peak systolic velocity, TSV = time to PSV, PDV = peak diastolic velocity, TDV=time to PDV, max = maximum velocity in vessel ROI, mean = average velocity in vessel ROI, ICC = intraclass correlation coefficients for absolute agreement