Table 3.
Summary of 5-point Likert scores for the original auto-contours, geometric similarity metrics and D2cc difference between the original and edited auto-contours
| Structure | Bladder | Small bowel | Sigmoid colon | Rectum | Urethra |
|---|---|---|---|---|---|
| 5-point Likert score | 4.8 ± 0.6 | 4.0 ± 0.9 | 3.9 ± 0.8 | 4.6 ± 0.7 | 4.3 ± 0.8 |
| DSC (%) | 0.99 ± 0.00 | 0.99 ± 0.01 | 0.96 ± 0.04 | 0.98 ± 0.10 | 0.87 ± 0.10 |
| MSD (mm) | 0.05 ± 0.03 | 0.27 ± 0.44 | 0.45 ± 0.87 | 0.16 ± 0.24 | 0.47 ± 0.88 |
| 95HD (mm) | 0.4 ± 0.2 | 1. 5 ± 2.5 | 3.2 ± 7.1 | 1.0 ± 2.1 | 2.4 ± 5.6 |
| HD (mm) | 1. 8 ± 0.6 | 10.2 ± 13.1 | 10.3 ± 14.3 | 4.0 ± 5.3 | 3.6 ± 7.5 |
| Original D2cc (Gy)* | 17.8 ± 6.7 | 7.5 ± 4.4 | 10.7 ± 4.9 | 13.0 ± 5.5 | 8.7 ± 5.8* |
| Edited D2cc (Gy)* | 17.8 ± 6.7 | 7.9 ± 4.8 | 11.1 ± 5.4 | 12.9 ± 5.7 | 8.7 ± 6.0* |
| D2cc difference (Gy)* | 0.03 ± 0.26 | −0.45 ± 1.11 | −0.41 ± 1.35 | 0.07 ± 0.60 | −0.08 ± 0.40* |
| P value (original vs edited D2cc) | .358 | .795 | .787 | .704 | .542 |
Abbreviations: 95HD = 95% Hausdorff distance; DSC = Dice similarity coefficient; HD= Hausdorff distance; MSD = mean surface distance.
⁎
All dose volume histogram metrics were evaluated with D2cc, except for the urethra, for which D0.1cc was used. P values comparing original D2cc (Gy) versus edited D2cc (Gy) values were calculated using the 2-tailed Wilcoxon signed-rank test. All measures reported in the format mean ± SD.