Table 1.

Patient characteristics.

Characteristic		Data	%
Sex	Male	12	60
	Female	8	40
Age	Average	56 years
	Range	36–77 years
Tumor histology	GBMa	18	90
	AAb	2	10
Surgical resection	Complete	12	60
	Partial	6	30
	No description	2	10
RTc	23 × 200 cGy + 7 × 200 cGy	8	40
	30 × 200 cGy	12	60
Margin (PTVdinitial)	Average	1.2 cm
	Range	0.8–1.7 cm
Margin (PTVboost)	Average	1.4 cm
	Range	0.9–1.9 cm

^aGBM: glioblastoma.

^bAA: anaplastic astrocytoma.

^cRT: radiotherapy.

^dPTV: planning target volume.