Table 2.
Dose parameters for organs at risk, i.e. average dose (in Gy) to heart, LADCA, and left lung for 20 patients with left-sided breast cancer comparing t-IMRT and t-VMAT, both in DIBH-technique
| Heart dose | DIBH-t-IMRT | DIBH-t-VMAT | Difference | p-value |
|---|---|---|---|---|
| Dmean | 2.96 ± 0.61 | 4.03 ± 0.74 | - 1.07 (− 26%) | 0.002 |
| D25% | 3.84 ± 0.69 | 4.81 ± 0.81 | - 0.97 (−20%) | 0.002 |
| D45% | 2.68 ± 0.69 | 3.81 0.63 | - 1.13 (−29%) | 0.003 |
| LADCA dose | ||||
| Dmax | 12.28 ± 3.49 | 15.45 ± 5.6 | - 3.17 (−20%) | 0.003 |
| Dmean | 5.80 ± 0.68 | 7.31 ± 0.97 | - 1.51 (−20%) | 0.03 |
| D25% | 6.58 ± 0.68 | 8.48 ± 1.18 | −1.9 (−22%) | 0.01 |
| Left Lung | ||||
| Dmean | 10.42 ± 0.71 | 9.89 ± 1.03 | + 0,53 (+ 5%) | 0.006 |