Table 4.
CTVtotal delineation agreement between centers
| UTE | MTE | LTE | ||
|---|---|---|---|---|
| DSC, mean ± SD | Round 1 | 0.63 ± 0.13 | 0.64 ± 0.08 | 0.63 ± 0.12 |
| Round 2 | 0.81 ± 0.03 | 0.76 ± 0.05 | 0.80 ± 0.09 | |
| P | 0.001 | 0.008 | 0.019 | |
| Hmean, mean ± SD (mm) | Round 1 | 5.66 ± 2.86 | 5.81 ± 1.67 | 7.34 ± 3.55 |
| Round 2 | 2.11 ± 0.53 | 2.90 ± 0.61 | 3.14 ± 1.62 | |
| P | 0.000 | 0.001 | 0.005 | |
| Volume, mean ± SD (cm3) | Round 1 | 148.89 ± 44.47 | 139.53 ± 31.76 | 165.31 ± 54.27 |
| Round 2 | 83.91 ± 18.25 | 81.33 ± 16.27 | 95.71 ± 25.59 | |
| P | 0.001 | 0.000 | 0.002 |
Abbreviations: CTVtotal the clinical target volume of the total volume, DSC dice similarity coefficient, SD standard deviation, Hmean mean undirected Hausdorff distances, UTE upper thoracic esophagus, MTE middle thoracic esophagus, LTE lower thoracic esophagus