Table 1.

Main patients’ characteristics.

Main Patients Characteristics		N = 184	%
Gender	Male	105	57.1
	Female	79	42.9
Age median (range)		60 (31–85)
Primary Histology	Lung	113	61.4
	Breast	30	16.3
	Melanoma	21	11.4
	Kidney	5	2.7
	GI	12	6.5
	Bladder	2	1.1
	Osteosarcoma	1	0.5
Planning target volume (PTV) (cm3)	Mean (range)	6.44 (0.37–45.41)
	Median	3.89
Number of brain metastases	1	114	62.0
	2–3	59	32.0
	>3	11	6.0
	Mean (range)	1 (1–6)
Prescription dose	PD1	78	42.4
	PD2	106	57.6