Table 1.
Model prediction accuracy comparison between the previous modeling process3 and the proposed modeling process with and without data augmentation.
| DVH RMSE (Vol %) | ||||
|---|---|---|---|---|
| Previous model | Proposed model | Proposed model with data augmentation | ||
| Parotid | 7.99 (0.36) | 6.92 (0.30) | 6.83 (0.28) | |
| Brainstem | 5.11 (0.39) | 3.73 (0.23) | 3.77 (0.26) | |
| Cord | 5.53 (0.27) | 5.19 (0.25)a | 4.92 (0.25) | |
| Mandible | 6.31 (0.23) | 5.70 (0.21) | 5.59 (0.22) | |
| Larynx | 9.32 (0.74) | 8.46 (0.80)a | 7.19 (0.35) | |
| Oral cavity | 8.23 (0.43) | 7.58 (0.40) | 7.33 (0.41) | |
| Pharynx | 7.63 (0.28) | 7.04 (0.32) | 6.65 (0.27) | |
DVH, dose volume histogram; RMSE, root mean squared error.
a
The improvement over the previous method is not statistically significant (paired‐sample t‐test, P> 0.05).