TABLE 4.
Average values of D 50% (dose to 50% volume) obtained with conventional, 4pi and 4pi without VMAT objectives plans for OARs of all 15 patients. p‐Values shown between parenthesis in third and fourth columns indicate if there was statistical significant difference between each 4pi plan (with and without VMAT objecftives) and the conventional one
| OAR | D50% (cGy) | ||
|---|---|---|---|
| Conventional | 4pi | 4pi without VMAT objectives | |
| Esophagus | 48.7 ± 53.8 | 23.9 ± 35.7 (p = 0.001) | 27.2 ± 39.9 7 (p = 0.009) |
| Spinal cord | 26.5 ± 22.2 | 9.4 ± 5.5 (p = 0.001) | 10.4 ± 6.1 (p = 0.005) |
| Skin | 11.7 ± 4.5 | 7.1 ± 2.7 (p = 0.001) | 8.1 ±3.1 (p = 0.001) |
| Liver | 70.68 ± 47.43 | 20.1 ± 20.3 (p = 0.001) | 20.3 ± 18.6 (p = 0.001) |
| Lungs | 50.4 ± 22.6 | 28.3 ± 11.7 (p = 0.001) | 32.1 ± 12.9 (p = 0.001) |
| Stomach | 73.3 ± 39.4 | 38.2 ± 27.7 (p = 0.001) | 44.4 ± 34.0 (p = 0.001) |
| Trachea | 5.7 ± 4.5 | 2.7 ± 2.2 (p = 0.001) | 3.1 ± 2.6 (p = 0.001) |
| Aorta | 45.2 ± 29.4 | 18.9 ± 7.5 (p = 0.001) | 22.4 ± 9.4 (p = 0.003) |
| IVC | 308.0 ± 161.1 | 260.5 ± 193.8 (p = 0.078)* | 319.2 ± 291.5 (p = 0.650)* |
| SVC | 20.5 ± 18.7 | 9.1 ± 4.0 (p = 0.001) | 11.0 ± 5.1 (p = 0.020) |
| Pulmonary veins | 82.8 ± 41.9 | 61.8 ± 59.7 (p = 0.031) | 73.0 ± 68.0 (p = 0.211)* |
| Pulmonary trunk | 49.1 ± 35.2 | 22.8 ± 12.9 (p = 0.001) | 26.9 ± 13.0 (p = 0.020) |
*Not statistically significant for p > 0.05.