Table 2.
Median values of individual metrics of all-participants’ delineations across all cases; including interquartile ranges (DSC = Dice coefficient; HD = maximum Hausdorff distance; MSD = Mean Surface Distance; GTV_P = gross primary tumor volume; GTV_N = gross nodal tumor volume; CTV = clinical target volume; PTV = planning target volume; mm = millimeters; IQR = Inter-Quartile Range).
| GTV_P | GTV_N | CTV | PTV | |
|---|---|---|---|---|
| Number of participants | ||||
| Case 1 | 13 | 12 | 16 | 17 |
| Case 2 | 14 | 9 | 16 | 16 |
| Case 3 | 15 | 13 | 15 | 15 |
| Case 4 | 16 | 0 | 16 | 16 |
| DSC median (IQR) | 0.87 (0.78–0.94) | 0.35 (0.10–0.46) | 0.80 (0.72–0.90) | 0.81 (0.70–0.90) |
| HD median in mm (IQR) | 12.6 (10.09–17.75) | 68.27 (41.20–80.31) | 43.73 (23.48–64.90) | 34.22 (24.80–59.18) |
| MSD median in mm (IQR) | 0.37 (0.15–0.81) | 17.5 (8.5–25.45) | 2.03 (0.40–4.31) | 1.56 (0.64–3.98) |
| VOR (%) | ||||
| Case 1 | 21.9 | 7.1* | 14 | 13 |
| Case 2 | 67.1 | 0 | 46.4 | 48.1 |
| Case 3 | 41 | 0 | 23.8 | 28 |
| Case 4 | 7.2 | N/A** | 4.4 | 9.9 |
*
Given the inter-observer variability in selection of included lymph node stations, this VOR was calculated based on the volumes segmented by group of participants with most harmonious approach (6 out of 12).
**
N/A: Not Applicable because this scan belongs to a patient with no nodal disease.