Table 2.

Geometric shifts as induced and as calculated by the localization software for the wedged‐field plan

Plan alignment/shifts	Nominal induced shift (cm)			Calculated shift (cm)
	LR	SI	AP	LR	SI	AP
Correct alignment	0	00	$-0.02$	0.00	$-0.04$
Vertical shift, 0.5 cm	0	0 0.5	0.00	0.00	0.41
Lateral shift, 0.5 cm	0.5	00	0.47	0.00	$-0.02$
Vertical shift, 1.0 cm	0	0 1.0	$-0.08$	0.06	0.89
Rotation, Center detector	0	00	0.12	0.02	0.04
Rotation, Edge detector	$-1.67$	0	$-0.90$	$-1.71$	0.05	$-0.80$

$\text{LR}=\text{left‐right}$; $\text{SI}=\text{superior‐inferior}$; $\text{AP}=\text{anterior‐posterior}$.

The induced shifts and calculated shifts in the corresponding direction are shown in bold text.