Table 4.

The set-up margins for: no correction, mNAL protocol and Internal Procedure.

Protocol used	No correction		mNAL		Internal Procedure
Analyzed the directions	Left–right	Cranial–caudal	Left–right	Cranial–caudal	Left–right	Cranial–caudal
Random errors σp	1.7	1.7	1.7	1.7	1.7	1.7
Systematic errors ∑	2.4	2.8	1.6	1.5	1.7	2.1
Differences between operators	0.2	0.3	0.2	0.3	0.2	0.3
Margins [mm]	7.2	8.2	5.1	4.9	5.4	6.4