Comparison of photon volumetric modulated arc therapy, intensity-modulated proton therapy, and intensity-modulated carbon ion therapy for delivery of hypo-fractionated thoracic radiotherapy

Table 2 Target volume dose distribution

Parameters	VMAT₁	IMPT₂	IMCIT₃		p value
Parameters	Mean (SD)			p _1,2	p _2,3	p _1,3
V₉₅	100% (0)	99% (1%)	100% (0)	1.00	0.02	0.46
D₉₅ ^a	59.57 (0.40)	59.63 (0.67)	59.85 (0.47)	0.17	0.04	0.01
D₉₉ ^a	58.00 (0.75)	57.99 (1.25)	58.38 (0.81)	0.46	0.02	0.21
D_max ^a	64.87 (0.92)	65.98 (1.14)	65.25 (0.77)	0.04	0.01	0.41
CI	1.25 (0.10)	1.37 (0.11)	1.30 (0.09)	0.01	0.00	0.11
HI	1.08 (0.02)	1.10 (0.02)	1.09 (0.01)	0.03	0.02	0.20
nCI	1.47 (0.80)	1.53 (0.78)	1.47 (0.77)	0.01	0.00	0.79

p _1,2 is VMAT vs. IMPT; p _2,3 is IMPT vs. IMCIT; p _1,3 is VMAT vs. IMCIT. ^aDose in Gy

ISSN: 1748-717X