Table 6.

Difference between expected phantom movement and detected phantom movement.

	Expected shifts (CBCT postshift registered to reference CBCT)						Expected — measured difference
	Rotation (°)			Translation (mm)			Rotation (°)			Translation (mm)
	X	Y	Z	X	Y	Z	X	Y	Z	X	Y	Z
MRI sim with CBCT
−0.01		0.05	−0.07	0.03	−0.56	0.14	0.09	0.15	0.07	−0.04	0.01	0.04
							0.02	−0.01	−0.02	0.02	0.03	0.00
							−0.01	−0.00	−0.02	−0.02	0.11	0.15
				Average Difference			0.03	0.04	0.01	−0.02	0.05	0.06
CT sim with CBCT
−0.01		0.05	−0.07	0.03	−0.56	0.14	−0.06	0.06	−0.10	−0.08	−0.03	0.02
							0.06	−0.26	−0.12	0.05	0.00	0.05
							0.07	−0.09	−0.08	0.03	0.03	−0.05
				Average Difference			0.02	−0.10	−0.10	−0.00	0.00	0.01

Abbreviations: CT, computed tomography; CBCT, cone beam CT.