Table 1.

Treatment planning objectives for VMAT and IMRT plans

Target	Dose—Volume Constraints	Weight
PTV	Min dose 50 Gy, to 98% volume	100
	Max dose 53 Gy	100
	Uniform dose 50.5 Gy	100
Normal Tissue	Dose—Volume Constraints	Weight
Spinal cord	No portion may receive 45 Gy	75
Contralateral lung	${\mathrm{V}}_5<40\%$	10
Whole lung	${\mathrm{V}}_5<60\%$	15
	${\mathrm{V}}_{20}<28\%$	13
	${\mathrm{V}}_{30}<20\%$	10
Heart	${\mathrm{V}}_{30}<40\%$	10
Ring	Max dose $<51\hspace{0.17em}\text{Gy}$	10