Table 4.

Detected intrafraction motion by SGRT and resulting additional CBCT shifts on reimaging. n = 25 unique patients (34 observations).

	A	B	C	D
	$\overline{\left|{\mathit{Shift}}_{\mathit{SGRT}}\right|}$	$\overline{\left|{\mathit{Shift}}_{\mathit{CBCT}}\right|}$	$\overline{\left({\mathit{Shift}}_{\mathit{CBCT}}-{\mathit{Shift}}_{\mathit{SGRT}}\right)}$	$\overline{\left|{\mathit{Shift}}_{\mathit{CBCT}}-{\mathit{Shift}}_{\mathit{SGRT}}\right|}$
Vertical (cm)	0.135	0.144	0.013	0.165
Longitudinal (cm)	0.196	0.109	−0.065	0.250
Lateral (cm)	0.100	0.158	0.016	0.169
Vector	0.332	0.314	−0.018	N/A
Pitch (˚)	0.376	0.112	−0.108	0.517
Roll (˚)	0.202	0.334	0.062	0.519
Rotation (˚)	0.286	0.038	0.143	0.309

A. This column contains the average of the magnitude of the shift deltas for the SGRT method, (calculated based on the absolute value of each shift). B. This column contains the average of the magnitude of the shift deltas for the Cone Beam method, (calculated based on the absolute value of each shift). C. This column is the average of the differences between CBCT measured shift and SGRT measured shift. D. This is the average of the magnitude (absolute value) of the differences between CBCT measured shift and SGRT measured shift.

CBCT, cone beam computed tomography; SGRT, Surface‐guided radiation therapy.