The Dosimetric Comparisons of CRT, IMRT, ARC, CRT+IMRT, and CRT+ARC of Postoperative Radiotherapy in IIIA-N2 Stage Non-Small-Cell Lung Cancer Patients

Table 2

Comparisons of PTV, OAR, and B-P dosimetric parameters between CRT plan and IMRT plan (cGy, ).

Dosimetric parameters	CRT plan	IMRT plan	Difference	value	value
PTV
Minimum dose/cGy	4353.7169.41	3936.34189.77	417.37197.05	6.698	0.001
Maximum dose/cGy	5397.29 82.69	5350.0861.15	47.21108.72	1.373	0.203
Median dose/cGy)	5001.5614.33	4979.0877.62	22.4881.23	0.875	0.404
Conformity index	0.690.05	0.800.04	-0.110.06	-5.367	0.001
Homogeneity index	0.210.02	0.280.04	-0.000.03	-0.330	0.749
V105 (%)	15.113.64	2.924.38	12.1916.34	2.359	0.043
OAR
Spinal cord Maximum dose	3214.23285.34	2636.20179.98	578.02259.87	7.034	0.001
Esophagus
V50 (%)	8.499.94	17.7914.08	-9.3016.53	-1.778	0.109
Maximum dose	5110.67113.32	5270.17109.33	-159.50132.28	-3.813	0.004
Heart
V20 (%)	23.7721.93	20.7821.65	2.971.75	5.382	0.001
V30 (%)	11.9812.97	9.8310.15	2.153.10	2.191	0.056
V40 (%)	6.927.43	4.875.24	2.052.26	2.864	0.019
V45 (%)	5.155.48	3.593.84	1.551.73	2.832	0.020
Mean dose	1061.75777.82	932.07702.92	129.6883.46	4.913	0.001
Normal lung
V5 (%)	54.248.06	49.596.17	4.642.27	6.456	0.001
V10 (%)	37.288.74	35.137.42	2.142.55	2.653	0.026
V13 (%)	33.627.95	30.316.38	3.292.25	4.636	0.001
V20 (%)	26.627.23	22.224.48	4.402.32	5.982	0.001
V30 (%)	11.591.64	8.631.47	2.951.38	6.771	0.001
Mean dose	1006.29522.53	1040.41147.82	-34.12418.64	-0.258	0.802
B-P
V5(%)	27.318.42	22.912.48	4.397.40	1.879	0.093
V10(%)	18.975.53	15.732.21	3.244.37	2.347	0.044
V15(%)	16.034.77	12.551.83	3.483.84	2.870	0.018
V20(%)	12.494.87	9.291.79	3.194.28	2.363	0.042
V25(%)	7.333.41	5.191.40	2.133.05	2.216	0.054
V30(%)	4.292.76	2.730.81	1.562.45	2.015	0.075
V35(%)	2.942.29	1.510.46	1.441.97	2.317	0.046
V40(%)	1.951.32	0.710.20	1.241.23	3.181	0.011
V45(%)	1.241.06	0.280.10	0.951.01	2.957	0.016
V50(%)	0.230.24	0.030.03	0.19.22	2.771	0.022