Table 3.
Dosimetric parameters of all ten virtual simulated IMRT 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.
| Virtual IMRT 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] | 3227 | 3276 | 3082 | 3102 | 3026 | 3220 | 3235 | 3092 | 3111 | 3135 | 3151 | 78 |
| Dmean [cGy] | 3731 | 3667 | 3811 | 3693 | 3681 | 3802 | 3649 | 3649 | 3633 | 3770 | 3709 | 63 |
| V33 [%] | 93.4 | 94.3 | 91.2 | 90.7 | 91.1 | 93.3 | 92.3 | 90.1 | 90.5 | 92.2 | 91.9 | 1.4 |
| volume of 33Gy + [cc] | 35.6 | 129.2 | 87.2 | 84.0 | 112.2 | 50.1 | 53.4 | 108.9 | 42.3 | 101.6 | 80.4 | 31.3 |
| 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] | 1.20 | 1.10 | 1.00 | 1.03 | 1.08 | 1.00 | 0.93 | 0.95 | 0.95 | 1.06 | 1.03 | 0.08 |
| D5 [cGy] | 4001 | 4012 | 4157 | 4053 | 3958 | 4141 | 3892 | 3952 | 3893 | 4144 | 4020 | 96 |
| HI [ratio] | 0.21 | 0.20 | 0.28 | 0.26 | 0.25 | 0.24 | 0.18 | 0.24 | 0.22 | 0.27 | 0.23 | 0.03 |