Table 1.

The average changes in the %DE for the DVH metrics due to MLC errors

Percentage dose difference of DVH metrics between the recalculated and the original plans (%)
Treatment	MLC errors	Structure
		Brainstem D2%	Spine D2%	R parotid DMean	L parotid DMean	PTV70 DMean
IMRT	Random	0.05 ± 0.06	0.02 ± 0.12	0.00 ± 0.01	0.00 ± 0.02	0.41 ± 0.95
	0.25 mm	2.62 ± 0.71	2.27 ± 0.32	2.67 ± 0.19	2.39 ± 0.39	1.47 ± 0.29
	0.50 mm	5.24 ± 1.37	4.58 ± 0.60	5.33 ± 0.39	4.77 ± 0.77	2.92 ± 0.58
	0.75 mm	7.95 ± 2.10	6.93 ± 0.86	7.99 ± 0.59	7.14 ± 1.15	4.36 ± 0.87
	1.00 mm	10.66 ± 2.83	9.33 ± 1.03	10.65 ± 0.79	9.52 ± 1.54	5.80 ± 1.16
VMAT	Random	−0.24 ± 0.69	−0.63 ± 0.49	1.03 ± 0.39	−0.70 ± 0.25	0.19 ± 0.07
	0.25 mm	1.46 ± 0.64	0.81 ± 0.30	0.97 ± 0.22	1.05 ± 0.39	0.78 ± 0.23
	0.50 mm	2.98 ± 1.32	1.60 ± 0.49	1.95 ± 0.46	2.09 ± 0.72	1.39 ± 0.41
	0.75 mm	4.52 ± 1.99	2.40 ± 0.70	2.94 ± 0.69	3.14 ± 1.05	1.99 ± 0.59
	1.00 mm	6.05 ± 2.66	3.30 ± 0.84	3.92 ± 0.93	4.19 ± 1.39	2.60 ± 0.78