Table 5. Absolute differences in the left lung between the perturbed and the original plans.
| Direction | ΔV20Gy (%) | ΔV30Gy (%) | ΔV40Gy (%) | ΔDmean (Gy) | ||||
|---|---|---|---|---|---|---|---|---|
| VMAT-5B | VMAT-10B | VMAT-5B | VMAT-10B | VMAT-5B | VMAT-10B | VMAT-5B | VMAT-10B | |
| A | -2.84 ± 0.35 | -3.42 ± 0.47 | -2.90 ± 0.35 | -3.34 ± 0.41 | -2.66 ± 0.36 | -3.09 ± 0.43 | -1.19 ± 0.15 | -1.47 ± 0.19 |
| P | 2.71 ± 0.32 | 2.14 ± 0.28 | 2.86 ± 0.34 | 2.45 ± 0.29 | 2.78 ± 0.34 | 2.35 ± 0.28 | 1.18 ± 0.14 | 0.84 ± 0.11 |
| L | -2.26 ± 0.32 | -2.84 ± 0.35 | -2.14 ± 0.27 | -2.58 ± 0.28 | -1.85 ± 0.25 | -2.28 ± 0.29 | -1.01 ± 0.13 | -1.30 ± 0.15 |
| R | 2.40 ± 0.32 | 1.82 ± 0.37 | 2.31 ± 0.26 | 1.89 ± 0.25 | 2.08 ± 0.24 | 1.64 ± 0.21 | 1.08 ± 0.12 | 0.74 ± 0.12 |
| S | -1.82 ± 0.30 | -2.42 ± 0.44 | -1.65 ± 0.26 | -2.11 ± 0.31 | -1.35 ± 0.22 | -1.83 ± 0.23 | -0.72 ± 0.10 | -1.04 ± 0.12 |
| I | 1.91 ± 0.29 | 1.33 ± 0.23 | 1.82 ± 0.29 | 1.40 ± 0.27 | 1.61 ± 0.24 | 1.17 ± 0.23 | 0.79 ± 0.11 | 0.47 ± 0.11 |
A, anterior; P, posterior; L, left; R, right; S, superior; I, inferior.