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Table 3 Dosimetric statistics between the supine and prone IMRT patients

From: Applying a RapidPlan model trained on a technique and orientation to another: a feasibility and dosimetric evaluation

  Original RapidPlan
Mean SD 95 % CIs (%) P Mean SD 95 % CIs (%) P
HI_PGTV S. 0.04 0.01 0.04 ~ 0.05 0 0.66* 0.05 0.01 0.04 ~ 0.05 0 0.97
P. 0.04 0.01 0.04 ~ 0.05 0.05 0.01 0.04 ~ 0.06
HI_PTV S. 0.24 0.01 0.24 ~ 0.25 0.01 0.24* 0.25 0.01 0.25 ~ 0.26 0.01 0.22*
P. 0.25 0.01 0.24 ~ 0.25 0.26 0.02 0.25 ~ 0.26
CI_PGTV S. 1.03 0.07 0.99 ~ 1.09 0.01 0.73 1.01 0.06 0.97 ~ 1.05 0.01 0.48
P. 1.02 0.05 1.00 ~ 1.04 1.02 0.05 0.99 ~ 1.04
CI_PTV S. 1.02 0.02 1.00 ~ 1.04 0.01 0.16 1.19 0.07 1.14 ~ 1.24 0.01 0.56*
P. 1.01 0.02 1.00 ~ 1.02 1.18 0.05 1.16 ~ 1.20
Dmax S. 52.93 0.45 52.61 ~ 53.25 0.03 (0.06 %) 0.98 54.73 1.67 53.53 ~ 55.93 0.41 (0.75 %) 0.48
P. 52.96 0.45 52.75 ~ 53.17 54.32 1.46 53.64 ~ 55.00
D2 % S. 52.56 0.41 52.26 ~ 52.85 0.07 (0.13 %) 0.68* 52.71 0.24 52.53 ~ 52.88 0.08 (0.15 %) 0.86
P. 52.63 0.45 52.42 ~ 52.84 52.79 0.61 52.50 ~ 53.07
D50 %_UB S. 34.13 2.73 32.16 ~ 36.06 0.41 (1.20 %) 0.74* 25.12 0.84 24.52 ~ 25.72 0.05 (0.20 %) 0.93*
P. 33.72 3.12 32.26 ~ 35.18 25.07 1.53 24.36 ~ 25.79
D50 %_FH S. 18.89 2.69 16.96 ~ 20.81 4.85 (25.67 %) <0.01* 14.67 1.80 13.38 ~ 15.95 1.41 (9.61 %) 0.01*
P. 14.04 2.28 12.97 ~ 15.11 13.26 0.94 12.82 ~ 13.70
Dmean_UB S. 34.25 2.90 32.17 ~ 36.32 0.39 (1.14 %) 0.72* 26.19 0.97 25.50 ~ 26.89 0.08 (0.31 %) 0.87*
P. 33.86 2.77 32.56 ~ 35.15 26.27 1.36 25.64 ~ 26.91
Dmean_FH S. 19.23 2.41 17.51 ~ 20.96 4.45 (23.14 %) <0.01 15.41 1.07 14.64 ~ 16.17 1.18 (7.66 %) <0.01*
P. 14.78 1.31 14.17 ~ 15.39 14.23 0.91 13.81 ~ 14.66
  1. Abbreviations: S. supine, P. prone, HI homogeneity index, CI conformity index, (%) difference between the supine and prone plans (% relative to the supine value), D max global maximum dose, D 2 % near maximum dose, SD standard deviation, 95 % CI 95 % confidence interval, D 50 % dose to the 50 % volume of the structure, D mean mean dose, FH femoral head, UB urinary bladder. Dose unit (Gy)
  2. *Independent sample t-test, otherwise Mann-Whitney U test was used