. Author manuscript; available in PMC: 2015 Mar 15.

Published in final edited form as: Int J Radiat Oncol Biol Phys. 2014 Mar 15;88(4):920–926. doi: 10.1016/j.ijrobp.2013.12.029

Table 1.

Comparison of dose statistics between the treatment plans

Organs	Dose statistic	Breast case			Chest wall case
		Isocentric plan		Nonisocentric plan	Isocentric plan		Nonisocentric plan
		Opposed tangential	VMAT (2 arcs)	Nonisocentric plan	Opposed tangential	VMAT (2 arcs)	Nonisocentric plan
PTV prescription or mean dose: 50 Gy	gEUD (Gy)	49.1	48.3	48.8	47.3	49.7	48.9
	D95 (Gy)	36.6	32.2	38.2	40.9	42.9	44.1
	D5 (Gy)	54.8	59.7	56.6	53.5	53.9	55.0
	Uniformity index	1.50	1.85	1.48	1.31	1.26	1.25
Ipsilateral lung	Mean dose or gEUD (Gy)	6.4	18.9	4.0	8.2	10.4	4.1
	V5 (%)	20.8	89.5	16.6	25.5	74.1	18.1
	V20 (%)	11.8	37.2	5.6	15.1	13.6	4.9
Heart	Mean dose or gEUD (Gy)	0.9	26.0	0.8	0.4	8.9	0.4

Abbreviations: gEUD = generalized equivalent uniform dose; VMAT = volumetric modulated arc therapy.