Parameters | Objective | Rapid Arc Mean ± SD | LF-IMRT Mean ± SD | p-Value (Independent Student t test) | Rapid Arc vs LF-IMRT | |
PTV70Gy | Mean (Gy) | 70 Gy | 70.56 ± 1.1 | 71.66 ± 1.08 | 0.011 | RA > IMRT |
D2% (Gy) | <74.9 Gy | 74.32 ± 1.5 | 74.06 ± 1.9 | NS | - | |
D98% (Gy) | >66.5 Gy | 67.95 ± 1.2 | 67.22 ± 1.4 | NS | - | |
D50% (Gy) | 70 Gy | 71.7 ± 1.1 | 70.7 ± 1.0 | 0.003 | RA > IMRT | |
D80% (Gy) | 70 Gy | 70.52 ± 1.1 | 69.45 ± 1 | 0.002 | RA > IMRT | |
V107 (%) | <2% | 2.1 ± 1.2 | 2.9 ± 1.8 | NS | - | |
HI95% | 0 | 0.089 ± 0.02 | 0.097 ± 0.03 | NS | - | |
CI95% | 1 | 0.906 ± 0.03 | 0.868 ± 0.07 | 0.021 | RA > IMRT | |
PTV54Gy | D2% (Gy) | <57.78 Gy | 63.5 ± 3.3 | 64.1 ± 5.3 | NS | - |
D98% (Gy) | >51.3 Gy | 50.4 ± 2.19 | 50.3 ± 2.1 | NS | - | |
D50% (Gy) | 50 Gy | 56.1 ± 1.5 | 55.68 ± 1.9 | NS | - | |
HI95% | 0 | 0.097 ± 0.3 | 0.25 ± 0.10 | <0.0001 | RA > IMRT |