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

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

		3DCRT	IMRT	RA	P-value
		3DCRT	IMRT	RA	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
Dmean	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
V5	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
V10	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
V20	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
V30	D > 8 cm	27.29 ± 11.32	35. 21 ± 3.57	31.17 ± 2.90	0.062	0.262	0.069

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.

ISSN: 1748-717X