Table 1.

Movement	Interscan		Intrascan
	Mean ± std	Range	Mean ± std	Range
X translation (mm)	0.8 ± 0.4	[0.3–1.8]	0.1 ± 0.1	[0.0–0.4]
Y translation (mm)	0.8 ± 0.5	[0.3–1.9]	0.2 ± 0.1	[0.1–0.6]
Z translation (mm)	1.7 ± 0.6	[0.7–2.6]	0.3 ± 0.1	[0.1–0.5]
Total translation	2.0 ± 0.8	[0.8–3.7]	0.4 ± 0.2	[0.1–1.0]
X rotation (deg)	1.6 ± 0.6	[0.8–2.7]	0.3 ± 0.2	[0.1–0.9]
Y rotation (deg)	0.7 ± 0.5	[0.3–1.8]	0.1 ± 0.1	[0.1–0.6]
Z rotation (deg)	0.8 ± 0.4	[0.3–1.8]	0.2 ± 0.1	[0.1–0.3]