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Table 3 Summary of the dosimetric results for PTVs, MUs and delivery time

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

PTV 3DCRT IMRT RA P-value
a b c
V95% (%) 99.73 ± 0.28 99.25 ± 1.2 99.23 ± 1.21 0.240 0.067 0.65
V100% (%) 80.57 ± 1.23 79.83 ± 4.01 78.56 ±3.50 0.21 0.23 0.52
V110% (%) 9.33 ± 8.58 3.12 ± 3.09 2.12 ±1.56 0.002 0.50 0.008
CI 0.72 ±0.03 0.83 ±0.04 0.84 ±0.05 0.000 0.633 0.000
HI 1.16 ±0.01 1.08 ±0.03 1.09 ± 0.03 0.072 0.623 0.041
MU 250.4 ± 16.20 853.2 ± 299.2 435.5 ± 134.8 0.000 0.007 0.002
Time (min) 0.92 ± 0.05 2.18 ± 1.10 0.75 ±0.13 0.000 0.000 0.332
  1. Statistical significance (p <0.05) is reported between couples from paired t-test analysis. Abbreviations: PTV planned tumor volume, 3DCRT 3-D conformal radiation therapy, IMRT intensity-modulated radiation therapy, RA RapidArc, V x% the volume receiving ≥ x% of the prescribed dose, CI conformity index, HI homogeneity index, MU monitor unit. a, IMRT versus 3DCRT; b, IMRT versus RA; c, RA versus 3DCRT.