Table 2 Differences in plan parameter (mean (SD)) for all three RT modalities
| Â | Measure | C-ion RT | Proton RT | Photon RT | |||
|---|---|---|---|---|---|---|---|
Pre-spacer | Post-spacer | Pre-spacer | Post-spacer | Pre-spacer | Post-spacer | ||
PTV | D98% (Gy) | 68.2 (0.44) | 67.7 (0.75) | 68.4 (0.24) | 68.2 (0.36) | 64.9 (1.52) | 67.6 (0.51) |
Dmean (Gy) | 72.5 (0.97) | 72.4 (0.79) | 74.3 (0.44) | 74.2 (0.33) | 72.7 (0.32) | 72.1 (0.17) | |
D50% (Gy) | 72.7 (1.07) | 72.6 (0.86) | 74.9 (0.51) | 74.7 (0.39) | 73.3 (0.43) | 72.4 (0.19) | |
D2% (Gy) | 75.4 (1.92) | 74.7 (1.42) | 76.8 (1.01) | 76.7 (0.69) | 74.9 (0.45) | 74.0 (0.38) | |
HI | 0.096 (0.03) | 0.093 (0.03) | 0.111 (0.01) | 0.113 (0.01) | 0.135 (0.01) | 0.089 (0.01) | |
Spinal cord | Dmax (Gy) | 4.3 (2.82) | 3.5 (2.10) | 5.4 (3.77) | 4.1 (2.74) | 14.8 (6.09) | 13.3 (5.31) |