Table 1 Planning parameter, weight, and aims for VMAT and IMRT optimization
Structures | Type | Dose (Gy) | Volume (%) | Weight | Aim |
|---|---|---|---|---|---|
PTV1 | Min dose | 49.8 | – | 90 | V50 Gy ≥ 95%, V55 Gy ≤ 1% |
| Â | Min DVH | 50.3 | 100 | 90 | Â |
|  | Max dose | 52.0 | – | 50 |  |
|  | Uniform dose | 50.5 | – | 10 |  |
PTV2 | Min dose | 49.5 | – | 90 |  |
| Â | Min DVH | 50.0 | 100 | 90 | Â |
|  | Max dose | 52.0 | – | 50 |  |
|  | Uniform dose | 50.0 | – | 10 |  |
Ipsilateral lung | Max DVH | 4.0 | 38 | 3 | V5 Gy ≤ 50%, V20 Gy ≤ 25% Mean dose < 15 Gy |
| Â | Max DVH | 10.0 | 28 | 3 | Â |
| Â | Max DVH | 18.0 | 18 | 5 | Â |
| Â | Max DVH | 28.0 | 8 | 3 | Â |
| Â | Max DVH | 40.0 | 1 | 10 | Â |
|  | Max EUD (a = 1) | 11.0 | 3 | 3 |  |
Heart | Max DVH | 5.0 | 15 | 3 | V30Gy ≤ 5% Mean dose ≤ 8 Gy |
| Â | Max DVH | 10.0 | 8 | 10 | Â |
|  | Max EUD (a = 1) | 5.0 | – | 5 |  |
Contralateral lung | Max DVH | 5.0 | 1 | 1 | V5 Gy < 5%\ Mean dose ≤ 3 Gy |
|  | Max EUD (a = 1) | 1.5 | – | 3 |  |
Contralateral breast | Max DVH | 5.0 | 3 | 1 | Mean dose ≤ 3 Gy |
|  | Max EUD (a = 1) | 2.0 | – | 3 |  |
Spinal cord | Max Dose | 25.0 | – | 10 | Dmax ≤ 30 Gy |