Table 5.
Dosimetric parameters of all ten virtual simulated VMAT plans D 95: the minimal dose to 95% of the PTV, D5: minimal dose to 5% of the PTV, Dmean: mean dose to the PTV, CI: conformal index, the ratio between PTV and volume receiving dose larger than prescription dose, HI: homogeneity index, the difference between D5 and D95, divided by Dmean.
| Clinically treated plan | pt 1 | pt 2 | pt 3 | pt 4 | pt 5 | pt 6 | pt 7 | pt 8 | pt 9 | pt 10 | mean | sd |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| D95 [cGy] | 3295 | 3305 | 3092 | 3075 | 2960 | 3150 | 3307 | 3153 | 3301 | 3037 | 3168 | 121 |
| Dmean [cGy] | 3776 | 3729 | 3840 | 3780 | 3803 | 3855 | 3629 | 3756 | 3831 | 3813 | 3781 | 63 |
| V33 [%] | 94.9 | 95.1 | 91.1 | 90.0 | 90.0 | 93.0 | 95.2 | 92.6 | 95.0 | 91.0 | 92.8 | 2.0 |
| volume of 33Gy + [cc] | 36.7 | 123.5 | 94.9 | 79.4 | 111.5 | 57.9 | 60.4 | 120.8 | 48.5 | 100.1 | 83.4 | 29.7 |
| volume of PTV [cc] | 29.7 | 117.2 | 86.9 | 81.2 | 104.1 | 50.1 | 57.4 | 115.0 | 44.3 | 95.8 | 78.2 | 29.4 |
| CI [ratio] | 1.23 | 1.05 | 1.09 | 0.98 | 1.07 | 1.16 | 1.05 | 1.05 | 1.09 | 1.05 | 1.08 | 0.07 |
| D5 [cGy] | 4028 | 4112 | 4167 | 4201 | 4215 | 4222 | 3797 | 4091 | 4182 | 4208 | 4122 | 124 |
| HI [ratio] | 0.19 | 0.22 | 0.28 | 0.30 | 0.33 | 0.28 | 0.14 | 0.25 | 0.23 | 0.31 | 0.25 | 0.06 |