Table 2 Comparision of absolute point dose, 2D and 3D gamma, absolute dose volume (D99% and D2% to PTV) amongst TPS calculated (planned), ion chamber measured and reconstructed dose distribution from LOTS for ten non-TMI patients treated for various clinical sites on RadiXact HT
Non-TMI Patient | Absolute dose (cGy) on cheese phantom | 2D/3D gamma (γ%) values between TPS calculated and | Deviation (%) between reconstructed and TPS calculated dose | ||||
|---|---|---|---|---|---|---|---|
Planned | Ion chamber measured | Reconstructed from LOTS | ArcCheck measured 2Dγ% | Reconstructed from LOTS 3Dγ% | D98% of PTV | D2% of PTV | |
P1 | 139 | 137.84 | 140 | 99.4 | 97 | 0.56 | 3.01 |
P2 | 135 | 134.88 | 135 | 99.8 | 100 | 0.11 | 0.96 |
P3 | 141 | 140.2 | 141 | 100 | 97 | 1.71 | 4.10 |
P4 | 172 | 171.51 | 171 | 100 | 100 | − 0.31 | − 0.15 |
P5 | 167 | 166.67 | 166 | 99.9 | 100 | − 0.61 | − 0.49 |
P6 | 144 | 143.15 | 145 | 100 | 96 | 0.28 | 1.47 |
P7 | 198 | 201.12 | 200 | 99.5 | 98 | 1.65 | 2.03 |
P8 | 176 | 175.72 | 178 | 100 | 99 | − 0.26 | 1.63 |
P9 | 149 | 149.65 | 149 | 98.7 | 100 | − 0.09 | 1.09 |
P10 | 122 | 124.13 | 122 | 97.5 | 100 | 1.70 | 0.57 |