Table 2.

XRF to EM registration accuracy for different table heights and positions. Average TRE ± St. Dev. for each table height and position are shown (n=25 trials each)

		Position
Type	Table Height (cm)	1	2	3
	39	0.99 ± 0.39	0.88 ± 0.44	0.68 ± 0.36
Prism	36	0.87 ± 0.38	0.87 ± 0.39	0.88 ± 0.39
	33	1.45 ± 0.34	0.68 ± 0.21	0.81 ± 0.23
	39	1.37 ± 0.38	1.00 ± 0.31	1.59 ± 0.31
Planar	36	1.44 ± 0.60	1.23 ± 0.54	1.60 ± 0.66
	33	1.92 ± 0.48	1.67 ± 0.31	1.65 ± 0.41