Table 2 Comparision of target coverage metrics for the PTV as a function of plan modality (\(\overline{x}\) ± SD)
From: The choice of multi-beam IMRT for whole breast radiotherapy in early-stage right breast cancer
Metric | 3DCRT | for-IMRT | inv-IMRT | HT | VMAT | p-value |
|---|---|---|---|---|---|---|
Dmax (Gy) | 55.94 ± 1.34 | 55.01 ± 1.30 | 54.16 ± 0.54 | 53.85 ± 0.66 | 55.08 ± 0.72 | <0.001 |
Dmean (Gy) | 51.86 ± 1.04 | 51.66 ± 1.00 | 51.18 ± 0.36 | 50.85 ± 0.22 | 51.35 ± 0.40 | 0.019 |
V53.5 (%) | 20.56 ± 15.60 | 13.03 ± 12.80 | 1.85 ± 1.77 | 0.39 ± 0.59 | 10.15 ± 2.98 | <0.001 |
IB-V50Gy (cc) | 765 ± 338 | 659 ± 423 | 696 ± 314 | 750 ± 376 | 717 ± 399 | 0.964 |
OB-V50Gy (cc) | 379 ± 323 | 245 ± 239 | 103 ± 58 | 76 ± 51 | 57 ± 29 | <0.001 |
CN | 0.58 ± 0.07 | 0.62 ± 0.08 | 0.75 ± 0.05 | 0.80 ± 0.05 | 0.73 ± 0.06 | <0.001 |
HI | 0.13 ± 0.02 | 0.12 ± 0.07 | 0.09 ± 0.01 | 0.06 ± 0.01 | 0.17 ± 0.02 | <0.001 |
MU | 231 ± 29 MU | 222 ± 14 MU | 1245 ± 146 MU | 9284 ± 354 MU | 300 ± 52 MU | <0.001 |