Elective breast radiotherapy including level I and II lymph nodes: A planning study with the humeral head as planning risk volume

Table 1 Initial set of objectives used for the inverse optimization

Region of Interest	Type	Target (cGy)	Volume (%)	Weight	gEUD
PTVp-Lungs-Skin07^a	Min DVH	4043	99	75
	Max DVH	4470	1	1
	Uniform Dose	4256		1
PTVn-Lungs-Skin07	Min DVH	4043	99	75
	Max DVH	4430	1	1
	Uniform Dose	4256		0.1
15_Ringtot_30^b	Max Dose	4256		5
Lungs	Max EUD	700		1	1
Heart	Max EUD	700		1	1
For 6-field IMRT and VMAT with sparing of the humeral head:
10_Ring_10^c	Max Dose	3900		1
hh+10^d	Max Dose	3800		1

^aPTVp excluding the lungs and the skin + 7 mm
^bA ring at 15 mm distance from PTVtotal with a width of 30 mm, excluding the lungs and skin + 7 mm
^cA ring at 10 mm distance from PTVtotal with a width of 10 mm, with the caudal border 1 cm below the sternoclavicular joint and excluding the skin + 7 mm
^dHumeral head + 10 mm

ISSN: 1748-717X