Table 1.
Average dosimetric data and plan evaluation parameters for the PTVs
Target | Plans | Prescription | Inhomogeneity | Conformity | ||||||
---|---|---|---|---|---|---|---|---|---|---|
Volumea | D min b | D max b | D mean c | p* | IC | p* | CN | p* | ||
PSV-PPS | Proton | 99.0 % | 96.3 % | 175.1 % | 69.3 | <0.001 | 0.571 | 0.029 | 0.051 | 0.796 |
IMRT | 96.6 % | 158.7 % | 63.7 | 0.491 | 0.054 | |||||
PPS-PGTVs | Proton | 99.2 % | 98.4 % | 133.1 % | 83.9 | 0.019 | 0.290 | <0.001 | 0.328 | 0.143 |
IMRT | 96.2 % | 135.0 % | 81.7 | 0.333 | 0.392 | |||||
PGTVs | Proton | 98.7 % | 99.3 % | 104.0 % | 91.6 | <0.001 | 0.046 | <0.001 | 0.216 | <0.001 |
IMRT | 97.8 % | 107.9 % | 93.9 | 0.097 | 0.358 |
*p-value associated with the values to the left; significant values are bold
aMinimum volume covered by the PD
bRelative to PD (%); defined to 0.02 cc
cin Gy