. Author manuscript; available in PMC: 2015 Jun 29.

Published in final edited form as: J Appl Clin Med Phys. 2015 Jan 8;16(1):5126. doi: 10.1120/jacmp.v16i1.5126

Table 1.

Initial dose-volume constraints and priorities for IMRT and VMAT optimization.

Structure	Dose-volume Constraints	Relative Priority
PTV	D₁₀₀ ≥ 95%; D_max ≤ 105%	80–120
CTV	D₁₀₀ ≥ 98%; D_max ≤ 102%	120–130
Skin	D_max ≤ 70%;	150
	V_50% ≤ 2%	80
ILB	V_100% ≤ 2%–7%; V_50% ≤ 10%–15%; V_20% ≤ 20%-30%;	50
CB	D_max ≤1%;	30
Heart	D_max ≤ 1%;	30
ILL	D_max ≤ 20%–30%; V10% ≤ 2%–7%	30
Normal tissue	Doses between 2 mm and 2 cm from PTV boundary to fall off from 100% to 50% of prescription	80