Dosimetric and radiobiological comparison of simultaneous integrated boost radiotherapy for early stage right side breast cancer between three techniques: IMRT, hybrid IMRT and hybrid VMAT

Table 3 Comparison of dosimetric parameters of SIB and PTV-SIB between IMRT, H-IMRT and H-VMAT

Structure	Parameters	IMRT	H-IMRT	H-VMAT	p value
Structure	Parameters	IMRT	H-IMRT	H-VMAT	a	b	c
SIB	D_2% (Gy)	52.73 ± 0.63	52.35 ± 0.60	52.68 ± 0.48	0.042	0.776	0.024
	D_mean (Gy)	51.18 ± 0.47	51.18 ± 0.59	51.41 ± 0.38	0.197	0.322	0.181
	V_95% (%)	99.88 ± 0.33	99.96 ± 0.11	100.00 ± 0.00	0.317	0.225	0.224
	CI	0.82 ± 0.06	0.84 ± 0.05	0.84 ± 0.04	0.202	0.163	0.747
	HI	0.12 ± 0.06	0.12 ± 0.02	0.13 ± 0.02	0.575	0.174	0.025
PTV-SIB	D_2% (Gy)	49.40 ± 0.68	49.29 ± 0.45	49.21 ± 0.39	0.581	0.359	0.461
	D_mean (Gy)	45.69 ± 0.42	45.60 ± 0.23	45.57 ± 0.28	0.438	0.264	0.660
	V_95% (%)	98.99 ± 0.42	99.37 ± 0.51	99.03 ± 0.67	0.06	0.621	0.076
	CI	0.63 ± 0.08	0.65 ± 0.10	0.650 ± 0.09	0.38	0.35	0.252

ISSN: 1748-717X