Table 2.
Contouring variation data for all head and neck cancer data set structures
| Structure | Dice coefficient |
Hausdorff distance (mm) |
||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| FDK_CBCT |
Iterative_CBCT |
P-value | FDK_CBCT |
Iterative_CBCT |
P-value | |||||
| Mean | SD | Mean | SD | Mean | SD | Mean | SD | |||
| Brain stem | 0.85 | 0.07 | 0.85 | 0.10 | .48 | 7.01 | 2.34 | 7.51 | 2.95 | .26 |
| Parotid_L∗ | 0.83 | 0.09 | 0.86 | 0.07 | .03 | 10.47 | 5.43 | 7.75 | 3.28 | <.01 |
| Parotid_R | 0.85 | 0.07 | 0.86 | 0.06 | .25 | 9.27 | 3.71 | 8.05 | 3.47 | .05 |
| Parotid_Combined∗ | 0.84 | 0.08 | 0.86 | 0.06 | .03 | 9.87 | 4.65 | 7.90 | 3.35 | <.01 |
| SpinalCanal | 0.92 | 0.02 | 0.92 | 0.02 | .46 | 5.40 | 2.56 | 4.64 | 1.91 | .09 |
| Subman_L | 0.83 | 0.10 | 0.80 | 0.12 | .28 | 6.91 | 4.54 | 7.26 | 4.51 | .31 |
| Subman_R | 0.79 | 0.21 | 0.77 | 0.17 | .49 | 7.52 | 6.63 | 8.32 | 5.55 | .16 |
| Subman_Combined | 0.81 | 0.16 | 0.79 | 0.15 | .39 | 7.22 | 5.63 | 7.79 | 5.04 | .14 |
Abbreviations: CBCT = cone beam computed tomography; FDK_CBCT = currently available algorithm; Iterative_CBCT = novel iterative algorithm; L = left; R = right; SD = standard deviation.
∗
Data values correspond to statistically significant improvement.