Table 2.
The doses at Point A, the lengths on the anterior–posterior (AP) and right–left (RL) axes covered by 50–100 Gy (EQD2) on the axial plane of Point A, and the volume covered by 50–100 Gy (EQD2)
| Plan | Plan (30 + 20 + 24) |
Plan (40 + 10 + 18) |
Plan (40 + 10 + 24) |
Plan (45 + 0 + 28) |
||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Center shielding width | 3 cm |
4 cm |
3 cm |
4 cm |
3 cm |
4 cm |
||||||||
| Doses at Point A | 78.0 Gy | 71.8 Gy | 72.1 Gy | 69.0 Gy | 80.1 Gy | 77.0 Gy | 84.1 Gy | |||||||
| Axis | AP | RL | AP | RL | AP | RL | AP | RL | AP | RL | AP | RL | AP | RL |
| Lengths covered by 100 Gy (cm) | 2.4 | 2.6 | 2.4 | 2.5 | 2.2 | 2.3 | 2.2 | 2.2 | 2.7 | 2.8 | 2.7 | 2.7 | 3.2 | 3.2 |
| Lengths covered by 90 Gy (cm) | 2.7 | 3.0 | 2.7 | 2.8 | 2.5 | 2.6 | 2.5 | 2.5 | 3.0 | 3.3 | 3.0 | 3.1 | 3.6 | 3.7 |
| Lengths covered by 80 Gy (cm) | 3.0 | 3.8 | 3.0 | 3.2 | 2.9 | 3.2 | 2.9 | 3.0 | 3.4 | 4.0 | 3.4 | 3.7 | 4.1 | 4.3 |
| Lengths covered by 70 Gy (cm) | 3.5 | 5.2 | 3.5 | 4.5 | 3.4 | 4.3 | 3.4 | 3.9 | 4.1 | 5.3 | 4.1 | 5.2 | 5.0 | 5.3 |
| Lengths covered by 60 Gy (cm) | 4.2 | 8.2 | 4.2 | 8.2 | 4.5 | 7.0 | 4.4 | 6.9 | 5.3 | 8.3 | 5.3 | 8.3 | 6.7 | 7.1 |
| Lengths covered by 50 Gy (cm) | 5.4 | >12 | 5.4 | >12 | 7.0 | >12 | 6.9 | >12 | 8.2 | >12 | 8.1 | >12 | 11.2 | >12 |
| Volume covered by 100 Gy (cm3) | 47.7 | 45.5 | 38.9 | 38.0 | 54.2 | 52.8 | 70.9 | |||||||
| Volume covered by 90 Gy (cm3) | 59.0 | 55.4 | 48.8 | 47.3 | 68.3 | 65.9 | 88.2 | |||||||
| Volume covered by 80 Gy (cm3) | 77.9 | 71.0 | 65.2 | 62.3 | 92.3 | 87.5 | 116.2 | |||||||
| Volume covered by 70 Gy (cm3) | 118.1 | 101.7 | 99.1 | 91.5 | 143.2 | 132.1 | 169.1 | |||||||
| Volume covered by 60 Gy (cm3) | 266.3 | 221.3 | 218.9 | 192.4 | 329.1 | 296.5 | 305.5 | |||||||
| Volume covered by 50 Gy (cm3) | 2389.4 | 2228.9 | 2464.5 | 2333.8 | 2609.2 | 2489.1 | 1257.7 | |||||||