Table 2. Radiation exposure of heart and other normal tissues.

Organ at risk	Parameters	3DCRT-FinF	5F-IMRT	2P-VMAT	F	p1	p2	p3
Heart	Dmean	7.29 ± 3.00	8.08 ± 2.73	11.90 ± 5.06	4.25	0.887	0.029	0.079
	V5Gy	22.14 ± 8.64	28.66 ± 10.39	68.14 ± 8.73	71.82	0.276	< 0.001	< 0.001
	V10Gy	14.95 ± 6.74	17.85 ± 7.09	42.33 ± 11.42	30.02	0.739	< 0.001	< 0.001
	V20Gy	12.48 ± 6.36	10.54 ± 5.17	19.48 ± 8.84	4.56	0.808	0.081	0.021
	V30Gy	10.74 ± 5.89	7.86 ± 4.53	11.14 ± 6.19	1.03	0.490	0.986.	0.399
Left lung	Dmean	15.32 ± 2.72	15.03 ± 3.09	18.57 ± 3.17	4.30	0.975	0.056	0.035
	V5Gy	49.63 ± 7.76	52.53 ± 7.65	70.36 ± 8.84	19.19	0.707	< 0.001	< 0.001
	V10Gy	37.52 ± 7.10	36.89 ± 7.75	51.67 ± 8.72	11.22	0.983	0.001	0.001
	V20Gy	31.36 ± 6.04	27.77 ± 7.08	34.08 ± 7.16	2.18	0.473	0.647	0.113
Right breast	Dmean	1.68 ± 1.60	2.81 ± 2.23	5.79 ± 2.71	9.09	0.504	0.001	0.016
Left humeral head	Dmean	12.65 ± 10.40	33.54 ± 9.00	40.77 ± 10.74	21.01	< 0.001	< 0.001	0.261
Spinal cord	V45Gy	2.46 ± 4.23	0	0	—	—	—	—
Healthy tissue	V50Gy	2.45 ± 2.38	1.55 ± 0.71	1.48 ± 0.76	1.29	0.386	0.336	0.995

Abbreviations: Dmean = mean dose (Gy); Vx = volume (%) receiving x dose (Gy) or higher; 3DCRT-FinF = three-dimensional conformal radiotherapy using field-in-field technique; 5F-IMRT = 5-field intensity-modulated radiotherapy; 2P-VMAT = 2 partial arcs volumetric modulated arc therapy. Data presented as mean ± standard deviation. F values from ANOVA analysis(α = 0.05). p1: 3DCRT-FinF & 5F-IMRT; p2: 3DCRT-FinF & 2P-VMAT; p3: 5F-IMRT & 2P-VMAT.