Table 1.

Patient positioning errors prior to cone-beam CT based image-guidance (IG) and immediately following image-guided radiosurgery (IG-RS)

	Prior IG (n = 98)			Post IG-RS (n = 64)
	Average	StDev	Max	Average	StDev	Max
LR [mm]	0.1	2.1	10.3	0.1	0.6	1.8
SI [mm]	−0.8	1.7	5.4	−0.3	0.8	3.0
AP [mm]	−2.7	2.0	9.9	−0.2	0.4	1.4
3D vector [mm]	3.9	1.9	11.9	0.9	0.6	3.0
Max Rotation [°]	1.7	0.8	4.0	0.6	0.5	3.0