Table 3 Values of Homogeneity Index (HI), Van’t Riet Conformity Index (CI) and Gradient Index (GI) for PTVwholebrain and PTVmetastases
Index | Formula | Value Halcyon | Value Synergy | |
|---|---|---|---|---|
PTV_wholebrain | HI | \(\frac{D2\% - D98\%}{D50\%}\) | 0.51 ± 0.04 | 0.36 ± 0.05 |
CI | \(\frac{TVri}{TV} x \frac{TVri}{Vri}\) | 0.30 ± 0.09 | 0.58 ± 0.18 | |
PTVmetastases | HI | \(\frac{D2\% - D98\%}{D50\%}\) | 0.04 ± 0.01 | 0.02 ± 0.01 |
CI | \(\frac{TVri}{TV} x \frac{TVri}{Vri}\) | 0.69 ± 0.15 | 0.68 ± 0.14 | |
GI | \(\frac{V \text{40,5}}{V 51}\) | 5.60 ± 1.95 | 4.8 ± 21.68 |