Table 2.
The planning dose parameter.
| Dose coverage | Mean | Max | Min | |
|---|---|---|---|---|
| PTV | D99% (cGy) | 4606.29 | 4871 | 4026 |
| D98% (cGy) | 4797.04 | 4949 | 4504 | |
| D95% (cGy) | 4943.32 | 5055 | 4006 | |
| Dmean (cGy) | 5216.07 | 5271 | 5155 | |
| D50% (cGy) | 5236.10 | 5302 | 5169 | |
| D2% (cGy) | 5440.28 | 5563 | 5303 | |
| Dmax (cGy) | 5462.10 | 5605 | 5320 | |
| Dmean (cGy) | 5216.07 | 5271 | 5155 | |
| HI | 0.12 | 0.18 | 0.08 | |
| Spinal cord | Dmax (cGy) | 664.41 | 1570 | 72 |
| Spinal cord PRV | Dmax (cGy) | 798.28 | 1634 | 78 |
| Lung (ipsilateral) | V30 (%) | 16.31% | 19.84% | 0.00% |
| V20 (%) | 21.66% | 28.14% | 0.00% | |
| V5 (%) | 46.10% | 54.44% | 4.37% | |
| Dmean (cGy) | 1198.68 | 1394.00 | 201.00 | |
| Heart | V30 (%) | 1.02 | 3.01 | 0.07 |
| V40 (%) | 0.22 | 0.89 | 0.00 | |
| Dmean (cGy) | 395.40 | 442.00 | 339.00 |
D99%, D98%, D95%, D50% and D2% is the dose of 99%, 98%, 95%, 50% and 2% PTV volume respectively. PTV, planning target volume. PRV, planning risk volume. V5, V20, V30 and V40 is the percentage volume receiving 5,20,30,40 Gy, respectively. HI, homogeneity index, HI = D2%-D98%/D50%.