Normal tissue parameter | Dose absolute reduction value | Dose reduction % | ||||
---|---|---|---|---|---|---|
 | PTV1 | PTV2 | PTV3 | from PTV1 to PTV2 | from PTV1 to PTV3 | from PTV2 to PTV3 |
Mean lung dose(Gy) | Â | Â | Â | Â | Â | Â |
central location | 5.42 | 2.42 | 2.91 | 55.4 | 46.3 | 9.1 |
peripheral location | 5.05 | 2.47 | 3.22 | 51.1 | 36.3 | 14.8 |
inferior lobe of lung | 11.46 | 6.07 | 7.47 | 47.0 | 34.8 | 12.2 |
Lung V20 (%) | Â | Â | Â | Â | Â | Â |
central location | 11 | 2.5 | 3.7 | 77.3 | 66.7 | 10.6 |
peripheral location | 8 | 2.5 | 4 | 68.8 | 50.0 | 18.8 |
inferior lobe of lung | 21 | 10 | 12 | 52.4 | 42.9 | 9.5 |
Spinal cord Maximum dose(Gy) | Â | Â | Â | Â | Â | Â |
central location | 59.34 | 24.64 | 26.58 | 58.5 | 55.2 | 3.3 |
peripheral location | 6.91 | 5.99 | 6.32 | 13.3 | 8.4 | 4.9 |
inferior lobe of lung | 22.50 | 18.67 | 20.00 | 17.0 | 11.1 | 5.9 |