Table 1.

Number of set-up errors for each individual patients after applying the No Action Level protocol. The percentage of errors ≥ 3 mm and ≥ 4 mm are given in relation to all fractions. The total number of fractions was 886. AP – Anterior-Posterior, CC – Cranial-Caudal, LR –Left-Right.

	before NAL
	AP	CC	LR	AP	CC	LR
	≥ 3 mm	≥ 3 mm	≥ 3 mm	≥ 4 mm	≥ 4 mm	≥ 4 mm
	98	79	91	44	38	30
% of fractions	11.1%	8.9%	10.3%	5.0%	4.3%	3.4%
	after NAL
	AP	CC	LR	AP	CC	LR
Patients number	≥ 3 mm	≥ 3 mm	≥ 3 mm	≥ 4 mm	≥ 4 mm	≥ 4 mm
Total (886)	84	57	39	31	15	10
% of fractions	9.5%	6.4%	4.4%	3.5%	1.7%	1.1%