Demographics and Radiation Dose Metrics
| Parameter | Data |
|---|---|
| Mean age (y) | 60 (range, 38–79) |
| Staging (n) | |
| TCIS | 3 |
| T1 | 8 (1 recurrence) |
| T2 | 3 |
| T3 | 1 |
| RT (n) | |
| Free-breathing RT | 4 (27%) |
| Tomotherapy | 2 |
| IMRT | 1 |
| VMAT | 1 |
| DIBH IMRT | 11 (73%) |
| Prescription dose (n) | |
| 42.5 Gy in 16 fractions | 14 |
| Boost of 10 Gy in 5 fractions | 7 |
| 48 Gy in 16 fractions | 1 |
| Mean heart dose (Gy) | 1.79 |
| Mean LV dose (Gy) | 2.07 |
| Mean LAD dose (Gy) | 2.78 |
| Mean heart V5Gy | 9.46% |
| Mean maximum heart dose (Gy) | 19.31 |
| Mean maximum LAD dose (Gy) | 8.41 |
| Adjuvant chemotherapy (n) | |
| Yes | 5 (33%) |
| Herceptin | 4 |
| No | 10 (67%) |
DIBH = deep inspiration breath-hold; IMRT = intensity-modulated radiation therapy; VMAT = volumetric-modulated arc therapy.