Table 2.
Dosimetric comparison between Plan (AD) and Plan (MD)
| Plan (AD) (mean ± SD) | Plan (MD) (mean ± SD) | Plan deviation (mean ± SD) | P value | ||
|---|---|---|---|---|---|
| PTV | Dmax (cGy) | 3528.3 ± 24.4 | 3531.8 ± 21.9 | − 3.55 ± 16.6 | 0.513 |
| V30 (%) | 94.96 ± 0.14 | 95 ± 0 | − 0.04 ± 0.14 | 0.423 | |
| D98 (cGy) | 2519.1 ± 61.2 | 2540.9 ± 24.2 | − 21.9 ± 53.2 | 0.223 | |
| D2 (cGy) | 3386.2 ± 11.4 | 3390.7 ± 9.7 | − 4.4 ± 7.2 | 0.079 | |
| Hippocampus | Dmean (cGy) | 906.9 ± 17.2 | 898.8 ± 14.1 | 8.1 ± 11.2 | 0.046 |
| Dmax (cGy) | 1671.5 ± 264.7 | 1450.3 ± 62.1 | 221.2 ± 257.9 | 0.022 | |
| V16(%) | 0.046 ± 0.070 | 0 ± 0 | 0.046 ± 0.070 | 0.064 | |
| Lens | Dmax (cGy) | 567.5 ± 42.0 | 568.5 ± 47.0 | − 1.03 ± 8.56 | 0.712 |
Plan deviation = Dose in Plan (AD)-Dose in Plan (MD); V30: the volume of PTV getting 30 Gy; D98: the dose received at 98% of PTV; D2: the dose received at 2% of PTV; V16: the volume of hippocampus getting 16 Gy