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Table 4 Comparison of predicting parameters for RILD between smaller and larger tumors

From: A comparison of liver protection among 3-D conformal radiotherapy, intensity-modulated radiotherapy and RapidArc for hepatocellular carcinoma

   3DCRT IMRT RA P-value
a b c
Dmean D ≤ 8 cm 14.65 ± 3.12 14.32 ± 2. 90 14.30 ± 2.93 0.064 0.094 0.314
D > 8 cm 25.31 ± 2.73 27.49 ± 2. 33 27.01 ± 2.18 0.014 0.433 0.026
V5 D ≤ 8 cm 58.30 ± 18.04 60.20 ± 17.62 66.18 ± 20.74 0.136 0.017 0.019
D > 8 cm 81.14 ± 14.70 83.72 ± 14.07 84.82 ± 14.23 0.051 0.226 0.090
V10 D ≤ 8 cm 43.21 ± 10.09 42.50 ± 8.26 47.62 ± 11.55 0.638 0.080 0.084
D > 8 cm 74.55 ± 20.56 78.15 ± 16.48 80.24 ± 17.61 0.359 0.074 0.189
V20 D ≤ 8 cm 26.83 ± 7.35 28.26 ± 6.92 26.08 ± 5.73 0.428 0.057 0.717
D > 8 cm 73.20 ± 16.10 64.99 ± 17.14 61.98 ± 13.34 0.023 0.273 0.022
V30 D ≤ 8 cm 18.51 ± 5.43 13.77 ± 4.51 14.72 ± 3.67 0.34 0.157 0.024
D > 8 cm 27.29 ± 11.32 35. 21 ± 3.57 31.17 ± 2.90 0.062 0.262 0.069
  1. Statistical significance (p <0.05) was reported between couples from paired t-test analysis. Abbreviations: 3DCRT 3-D conformal radiation therapy, IMRT intensity-modulated radiation therapy, RA RapidArc. V x the volume of the OARs receiving the dose > x Gy. D mean the mean dose for the organ, a, IMRT versus 3DCRT. b, IMRT versus RA; c, RA versus 3DCRT.