Table 2 Dosimetric characteristics at the 42 Gy and 40 Gy step
Characteristic | 42 Gy (n = 17) | 40 Gy (n = 31 patients, 32 tumors) | ||
|---|---|---|---|---|
Median | Min - max | Median | Min - max | |
PTV coverage | ||||
V100% | 99 | 97 - 100 | 99 | 95 - 100 |
V95% | 100 | 100 - 100 | 100 | 99 - 100 |
V90% | 100 | 100 - 100 | 100 | 99 - 100 |
Ipsilateral breast | ||||
V32 Gy (%) | 35 | 13 - 48 | 40 | 21 - 50 |
V24 Gy (%) | 39 | 15 - 53 | 46 | 23 - 54 |
V16 Gy (%) | 43 | 16 - 57 | 49 | 24 - 57 |
V8 Gy (%) | 54 | 18 - 68 | 55 | 26 - 75 |
Non target breast | ||||
V40 Gy (%) | 10 | 3 - 18 | 8 | 3 - 18 |
V32 Gy (%) | 25 | 10 - 35 | 29 | 6 - 38 |
V20 Gy (%) | 32 | 12 - 44 | 35 | 8 - 45 |
V10 Gy (%) | 44 | 14 - 60 | 44 | 11 - 63 |
Ipsilateral lung | ||||
V20 Gy (%) | 0 | 0 - 1 | 0 | 0 - 1 |
V10 Gy (%) | 0 | 0 - 2 | 1 | 0 - 6 |
V5 Gy (%) | 3 | 0 - 5 | 4 | 0 - 12 |
Heart | ||||
V20 Gy (%) | 0 | 0 - 0 | 0 | 0 - 0 |
V10 Gy (%) | 0 | 0 - 0 | 0 | 0 - 1 |
V5 Gy (%) | 0 | 0 - 1 | 1 | 0 - 4 |
left breast cancer, n = 9 | left breast cancer, n = 13 | |||