Table 1. Target coverage goals and OAR constraints used in Ethos planning.

Structure	Goal	Priority
PTV_4000	D99%>30 Gy	1
PTV_4000	V35 > 90%	1
Small Bowel	D0.03cc < 32.5 Gy	1
Small Bowel	V32.5 < 0.03cc	1
Stomach	D0.03cc < 32.5 Gy	1
Stomach	V32.5 < 0.03cc	1
Large Bowel	D0.03cc < 34 Gy	1
Large Bowel	V34 < 0.03cc	1
Spinal canal	D0.03cc < 18 Gy	1
Both Kidneys	V20 < 110cc	2
Both Kidneys	V10 < 180cc	2
Both Kidneys	Dmean < 10 Gy	3
Both Kidneys	D0.03cc < 41.5 Gy	3
Liver	V21.5 < 550cc	2
Esophagus	D0.03cc < 34 Gy	1
Esophagus	D5cc < 31.5 Gy	2
Spinal canal + 0.5cm	D0.03cc < 22Gy	2
Both Lungs	V13.5 < 37%	2
Right Lung	V12.5 < 1500cc	3
Left Lung	V12.5 < 350cc	3
Heart	D0.03cc < 41.2 Gy	2
Heart	V41.2 < 0.03cc	2
Bronchial Tree	D0.03cc < 42 Gy	2
Bronchial Tree	V42 < 0.03cc	3
Great Vessels	D0.03cc < 41.5 Gy	2
Great Vessels	V41.5 < 0.03cc	3
Trachea	D0.03cc < 41.5 Gy	2
Trachea	V41.5 < 0.03cc	3