Table 4 Average normal tissue dose-volume parameters based on PTVpre and PTVreal in each original and simulated IMRT plans
Normal tissue parameter | Average parameters based on PTVpre | Average parameters based on PTVreal | Average parameters reductions from PTVpre to PTVreal (%) |
|---|---|---|---|
Lung (n = 4) | |||
Maximum dose | 57.3 Gy | 55.2 Gy | 3.7 |
Average dose | 10.8 Gy | 9.2 Gy | 14.8 |
V20 | 12.2% | 10.9% | 10.7 |
V12.5 | 23.5% | 20.1% | 14.5 |
Liver (n = 4) | |||
Maximum dose | 58.6 Gy | 56.1 Gy | 4.3 |
Average dose | 14.6 Gy | 11.7 Gy | 19.9 |
V30 | 12% | 8% | 33.3 |
V20 | 27% | 19% | 29.6 |
V10 | 38% | 30% | 21.1 |
kidney (n = 4) | |||
Maximum dose | 60.2 Gy | 57.8 Gy | 4.0 |
Average dose | 14.6 Gy | 11.4 Gy | 21.9 |
V30 | 7% | 4% | 42.9 |
V20 | 21% | 16% | 23.8 |
V10 | 39% | 31% | 20.5 |
Cord (n = 10) | |||
Maximum dose | 68.4 Gy | 49.1 Gy | 28.2 |
Average dose | 34.3 Gy | 31.2 Gy | 9.1 |
D5spine | 54.4 Gy | 45.3 Gy | 16.7 |