Table 1.
Measured and calculated dose differences of five spine SBRT plans with four DLG values per energy. The underlined bold numbers are the final DLG values and the corresponding mean errors. Error (%) = (measure dose − plan dose)/plan dose × 100.
| 6X |
6XFFF |
10XFFF |
||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| DLG (mm) | 0.39 | 0.6 | 0.8 | 1.1 | 0.27 | 0.5 | 0.6 | 0.9 | 0.42 | 0.8 | 1.2 | 1.5 |
| SBRT1 | 4.2 | 2.8 | 1.4 | −0.5 | 4.5 | 3.1 | 2.5 | 0.8 | 8.4 | 5.5 | 2.6 | 0.5 |
| SBRT2 | 2.0 | 1.5 | 1.0 | 0.3 | 2.0 | 1.4 | 1.2 | 0.5 | 3.8 | 2.8 | 1.9 | 1.2 |
| SBRT3 | 4.2 | 2.2 | 0.4 | −2.2 | 3.9 | 2.0 | 1.1 | −1.3 | 7.9 | 4.2 | 0.7 | −1.8 |
| SBRT4 | 6.6 | 5.3 | 4.1 | 2.3 | 5.1 | 3.7 | 3.1 | 1.4 | 8.1 | 5.6 | 3.1 | 1.3 |
| SBRT5 | 4.0 | 2.5 | 1.1 | −0.8 | 3.0 | 1.3 | 0.5 | −1.6 | 5.6 | 3.3 | 0.9 | −0.8 |
| Mean | 4.2 | 2.9 | 1.6 | −0.2 | 3.7 | 2.3 | 1.7 | 0.0 | 6.8 | 4.3 | 1.8 | 0.1 |