Table 3. Summary of intra-fraction motion based on CBCT registrations using both the target and nose regions of interest, and infrared tracking of the nose marker.

	Target - CBCT
	LR (mm)	CC (mm)	AP (mm)	Vector (mm)	Pitch (°)	Roll (°)	Yaw (°)
Mean	0.05	0.05	-0.09	0.34	0.02	-0.01	0.11
SD	0.22	0.30	0.19	0.25	0.45	0.25	0.33
Maximum	0.80	0.90	0.40	1.52	1.3	1.1	1.5
Minimum	-0.50	-1.20	-1.00		-2	-1	-0.8
	Nose - CBCT
	LR (mm)	CC (mm)	AP (mm)	Vector (mm)	Pitch (°)	Roll (°)	Yaw (°)
Mean	0.04	0.09	-0.07	0.37	-0.03	0.01	0.11
SD	0.24	0.34	0.18	0.28	0.40	0.24	0.31
Maximum	0.9	1.5	0.4	1.72	1	1.3	1.5
Minimum	-0.5	-1.4	-0.9		-1.9	-0.5	-0.6
	Nose - Optical
	LR (mm)	CC (mm)	AP (mm)	Vector (mm)
Mean	-0.06	-0.01	-0.17	0.56
SD	0.27	0.28	0.63	0.51
Maximum	0.87	2.73	0.83	3.16
Minimum	-1.28	-2.91	-0.90