Table 1.

Patient characteristics.

Characteristics	No.
Age	67 (37–88)
Sex
Male	27
Female	18
KPS	80 (50–100)
Extra-cranial metastases
Yes	24
No	21
Number of intracranial metastases	2 (1–9)
Histology
NSCLC	15
Melanoma	10
Breast	5
Colorectal	2
Others	13
Median volume of cavity (cc)	20.5 (2.2–71.1)
Median volume of PTV (cc)	51.1 (7.3–176.4)
PTV/cavity volume	0.4 (0.1–0.6)
Conformity index	1.01 (0.1–2.0)