Table 1.

Maximum rotational error measured on four linacs over 363 days

Measurements	Linac‐A (preadjustment) 2	Linac‐A (preadjustment) 15	Linac‐B 27	Linac‐C 2	Linac‐D 2
Mean (mm)	2.11	0.40	1.40	0.92	1.19
Range (mm)	$2.03-2.19$	$0.25-0.65$	$1.13-1.88$	$0.91-0.92$	$1.10-1.28$