Table 4 Differences in lung-dose parameters for SBRT plans based on 3 different ITVs
Parameters | ITVall+slow | ITVall | ITV2+slow | ITVall+slow vs. ITVall | ITVall+slow vs. ITV2+slow | ITVall vs. ITV2+slow | |||
|---|---|---|---|---|---|---|---|---|---|
(Mean ± SD) | (Mean ± SD) | (Mean ± SD) | Mean (range) | p* | Mean (range) | p* | Mean (range) | p* | |
MLD (cGy) | 357.3 ± 89.7 | 351.6 ± 89.6 | 353.1 ± 88.1 | 5.8 (−1.2-33.9) | 0.001 | 4.3 (0.1-13.5) | 0.001 | −1.5 (−33.8-12.3) | 0.887 |
V5 (%) | 17.05 ± 3.90 | 16.88 ± 3.88 | 16.94 ± 3.87 | 0.18 (−0.07-1.04) | 0.011 | 0.11 (−0.01-0.47) | 0.001 | −0.06 (−1.04-0.54) | 0.910 |
V10 (%) | 11.77 ± 2.98 | 11.57 ± 2.94 | 11.67 ± 2.98 | 0.20 (−0.05-1.38) | 0.008 | 0.10 (0.01-0.23) | 0.001 | −0.10 (−1.37-0.17) | 0.820 |
V20 (%) | 5.10 ± 1.90 | 4.97 ± 1.88 | 5.00 ± 1.86 | 0.14 (0.00-0.86) | 0.001 | 0.10 (0.00-0.30) | 0.001 | −0.03 (−0.85-0.24) | 0.776 |
V25 (%) | 3.37 ± 1.37 | 3.28 ± 1.37 | 3.29 ± 1.31 | 0.09 (−0.01-0.55) | 0.001 | 0.09 (0.00-0.37) | 0.001 | 0.00 (−0.55-0.30) | 0.496 |
V30 (%) | 2.28 ± 0.98 | 2.22 ± 0.98 | 2.22 ± 0.93 | 0.06 (0.00-0.37) | 0.001 | 0.06 (0.00-0.27) | 0.001 | 0.00 (−0.38-0.21) | 0.496 |