Table 2.

Coordinates of each marker in Frame‐based stereotactic space and CBCT‐based stereotactic space and the differences between each definition as established in the agreement of CBCT‐based with Frame‐based stereotactic space test. The magnitude of vector difference is calculated as $r=\sqrt{{\left(x_{\mathit{Frame}}-x_{\mathit{CBCT}}\right)}^2+{\left(y_{\mathit{Frame}}-y_{\mathit{CBCT}}\right)}^2+{\left(z_{\mathit{Frame}}-z_{\mathit{CBCT}}\right)}^2}$

					Displacement (mm) in
Marker ID	Coordinates definition	x	y	z	x	Y	z	r (mm)
BB1	Frame‐based	78.2	141.4	68.2	0.4	0	‐0.4	0.57
	CBCT‐based	77.8	141.4	68.6
BB2	Frame‐based	101	107.1	83.2	0.3	0	‐0.3	0.42
	CBCT‐based	100.7	107.1	83.5
BB3	Frame‐based	120	78	97.4	0.3	−0.1	0.1	0.33
	CBCT‐based	119.7	78.1	97.3
BB4	Frame‐based	136.8	53.1	109.6	0.3	−0.3	0.3	0.52
	CBCT‐based	136.5	53.4	109.3
BB5	Frame‐based	154.1	24.5	122.8	0.3	−0.3	0.5	0.66
	CBCT‐based	153.8	24.8	122.3