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Table 2 The summary of all investigated DVH-parameters as mean values ± standard deviation (SD)

From: Volumetric intensity-modulated Arc (RapidArc) therapy for primary hepatocellular carcinoma: comparison with intensity-modulated radiotherapy and 3-D conformal radiotherapy

   3DCRT IMRT RA
CTV V95% (%) 99.57 ± 0.39 99.65 ± 0.42 99.69 ± 0.42
PTV V95% (%) 95.50 ± 2.41 95.27 ± 1.99 95.31 ± 1.64
  V100% (%) 76.81 ± 5.95 77.88 ± 4.27 77.47 ± 2.64
  V107% (%) 7.49 ± 7.92 3.71 ± 3.00 1.74 ± 2.82
  CI 1.286 ± 0.11 1.19 ± 0.06 1.12 ± 0.05
  HI 1.13 ± 0.05 1.13 ± 0.04 1.12 ± 0.03
Normal liver Dmean (Gy) 21.58 ± 3.01 19.31 ± 2.89 21.97 ± 2.61
  V40 Gy (%) 23.05 ± 4.06 18.61 ± 4.13 18.85 ± 3.97
  V30 Gy (%) 32.10 ± 6.80 26.23 ± 5.87 27.77 ± 5.34
  V20 Gy (%) 42.12 ± 7.56 37.16 ± 8.65 43.67 ± 8.18
  V10 Gy (%) 60.55 ± 10.24 57.24 ± 10.02 75.77 ± 13.13
  NTCP 7.57 ± 4.36 3.98 ± 3.00 4.38 ± 2.69
Stomach Dmean (Gy) 23.16 ± 16.50 20.63 ± 15.26 23.42 ± 13.70
Left Kidney Dmean (Gy) 11.37 ± 6.62 8.36 ± 4.60 7.69 ± 5.06
Right Kidney Dmean (Gy) 14.99 ± 13.11 13.11 ± 11.42 11.84 ± 10.41
Spinal Cord D1% (Gy) 38.94 ± 7.62 43.89 ± 2.01 38.51 ± 8.90
MU   322.33 ± 28.62 1165.44 ± 170.68 323.78 ± 60.65
  1. PTV: planned tumor volume; MU: monitor unit; 3DCRT: 3-D conformal radiation therapy; IMRT: intensity-modulated radiation therapy; RA: RapidArc.