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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

From: Leaf open time sinogram (LOTS): a novel approach for patient specific quality assurance of total marrow irradiation

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