Table 3.
Inter-observer reproducibility metrics and identification for abdominal veins measured in 15 patients.
| PV | SMV | Splenic vein | Suprarenal IVC | Infrarenal IVC | Right Hepatic Vein | Middle Hepatic Vein | ||
|---|---|---|---|---|---|---|---|---|
| Cohen’s kappa | 0.63 | 0.48 | 0.67 | 0.63 | 0.70 | 0.86 | 0.60 | |
| p | 0.008 | 0.029 | 0.006 | 0.008 | 0.007 | 0.001 | 0.019 | |
| Area | CV (%) | 19.7 | 21.8 | 11.9 | 14.7 | 13.8 | 17.2 | 11.7 |
| Bias (%) | 10.6 | −7.0 | −3.2 | −7.1 | −15.5 | −8.4 | −8.7 | |
| BALA (%) | −70.6,91.8 | −86.6,72.6 | −47.3, 40.9 | −59.9,45.7 | −73.0,42.1 | −75.0,58.2 | −42.4,25.0 | |
| Average Velocity | CV (%) | 13.2 | 22.4 | 10.6 | 14.1 | 16.8 | 25.7 | 40.8 |
| Bias (%) | −3.8 | −6.8 | 12.1 | 11.2 | −3.7 | −26.8 | −57.6 | |
| BALA (%) | −56.4,48.8 | −87.0,73.4 | −26.0,50.2 | −44.7,67.0 | −64.2,56.8 | −129.5,75.9 | −161.2,45.9 | |
| Peak Velocity | CV (%) | 10.1 | 13.6 | 13.8 | 14.0 | 14.7 | 14.7 | 32.6 |
| Bias (%) | 2.1 | −11.3 | 15.2 | 9.7 | −11.4 | −14.5 | −46.1 | |
| BALA (%) | −35.0,39.2 | −62.6,40.0 | −19.6,50.0 | −40.7,60.1 | −63.2,40.4 | −94.3,65.2 | −110.4,18.1 | |
| Flow | CV (%) | 14.5 | 11.5 | 10.3 | 19.1 | 21.0 | 32.4 | 45.9 |
| Bias (%) | 7.6 | −14.6 | 8.9 | 4.3 | −19.3 | −35.1 | −64.9 | |
| BALA (%) | −48.6,63.8 | −44.4,15.2 | −25.3,43.1 | −70.1,78.6 | −94.3,55.7 | −147.8,77.7 | −166.8,37.0 |
Veins: IVC = inferior vena cava, PV=portal vein (intrahepatic), SMV=superior mesenteric vein, Data for the left hepatic vein was not analyzed, since this vessel could be segmented in only 6 out of 52 patients. CV=coefficient of variation, BALA=Bland-Altman limits of agreement.