Table 1.

Mean match position (${\overline{x}}_k$) for CT-CBCT, and MRI-CBCT image matching for each region and direction (lateral, longitudinal, and vertical (mm), rotational (°)).

		MRI-CBCT			CT-CBCT
Variable		Mean	Standard error	p-value	Mean	Standard error	p-value
Prostate soft tissue	Lateral (mm)	0.02	0.01	0.01	0.02	0.01	0.02
	Longitudinal (mm)	−0.05	0.02	0.02	−0.05	0.02	0.01
	Vertical (mm)	0.05	0.22	0.04	0.02	0.02	0.01
	Rotation (°)	−0.24	0.07	<0.01	−0.28	0.07	<0.01
Prostate gold seed	Lateral (mm)	0.03	0.01	0.02	0.03	0.01	<0.01
	Longitudinal (mm)	−0.04	0.01	<0.01	−0.03	0.01	0.04
	Vertical (mm)	0.00	0.01	<0.01	−0.01	0.01	0.02
	Rotation (°)	0.42	0.09	<0.01	0.14	0.03	<0.01
Rectum	Lateral (mm)	0.02	0.01	0.04	−0.08	0.01	0.10
	Longitudinal (mm)	−0.04	0.02	<0.01	−0.02	0.01	0.25
	Vertical (mm)	0.04	0.02	0.01	0.08	0.01	<0.01
	Rotation (°)	0.00	0.04	0.34	−0.06	0.03	0.10
Gynaecological	Lateral (mm)	−0.01	0.01	0.11	−0.02	0.01	0.01
	Longitudinal (mm)	0.05	0.02	<0.01	0.02	0.01	0.09
	Vertical (mm)	0.04	0.02	0.04	0.01	0.02	0.06
	Rotation (°)	−0.12	0.12	0.34	0.03	0.13	0.82