Table 1 Optimization objectives were set according to prescription dose and predicted fluence generated dose information
ROI name | Objective type | Objective dose (Gy) | Priority |
|---|---|---|---|
PTV-GTV | Maximum D0% | 73.5 | 70 |
Minimum D100% | 71.5 | 150 | |
PTV-1-Crop | Maximum D0% | PTV-1’ Px-dose + 3 | 70 |
PTV-1 | Minimum D100% | PTV-1’ Px-dose | 150 |
PTV-2-Crop | Maximum D0% | PTV-2’ Px-dose + 6 | 70 |
PTV-2 | Minimum D100% | PTV-2’ Px-dose | 150 |
PTV-LN(L) | Maximum D0% | PTV-LN(L)’ Px-dose + 3 | 70 |
Minimum D100% | PTV-LN(L)’ Px-dose + 1.5 | 150 | |
PTV-LN(R) | Maximum D0% | PTV-LN(R)’ Px-dose + 3 | 70 |
Minimum D100% | PTV-LN(R)’ Px-dose + 1.5 | 150 | |
Brainstem | Maximum gEUD, a = 20 | Predicted gEUD × 0.85 | 50 |
Brainstem 3 mm | Maximum gEUD, a = 20 | Predicted gEUD × 0.85 | 50 |
Spinal cord | Maximum gEUD, a = 20 | Predicted gEUD × 0.85 | 50 |
Spinal cord 3 mm | Maximum gEUD, a = 20 | Predicted gEUD × 0.85 | 50 |
Left normal parotid | Maximum gEUD, a = 3 | Predicted gEUD × 0.75 | 50 |
Right normal parotid | Maximum gEUD, a = 3 | Predicted gEUD × 0.75 | 50 |
Left optic nerve | Maximum gEUD, a = 1 | Predicted gEUD | 50 |
Right optic nerve | Maximum gEUD, a = 1 | Predicted gEUD | 50 |
Chiasm | Maximum gEUD, a = 1 | Predicted gEUD | 50 |
Ring 2 cm | Maximum D1% | Predicted dose × 0.95 | 50 |
Maximum D20% | Predicted dose × 0.95 | 50 | |
Maximum D50% | Predicted dose × 0.95 | 50 | |
Maximum gEUD, a = 15 | Predicted gEUD × 0.95 | 50 | |
40 Gy-PTV2 | Maximum D1% | Predicted dose × 0.95 | 50 |
Maximum D20% | Predicted dose × 0.95 | 50 | |
Maximum D50% | Predicted dose × 0.95 | 50 | |
Maximum gEUD, a = 10 | Predicted gEUD × 0.95 | 50 |