		Respiratory motion [amplitude, period]
		[10 mm, 4 s]	[20 mm, 4 s]	[40 mm, 4 s]	Mean ± SD
Predicted positional error of the 4D model	Mean ± SD [mm]	0.15 ± 0.11	0.16 ± 0.11	0.32 ± 0.25
Predicted positional error of the 4D model	Mean + 2SD [mm]	0.37	0.38	0.82
Correlation coefficient R	vs velocity [mm/s]	0.05	0.26	0.11	0.15 ± 0.09
Correlation coefficient R	vs acceleration [mm/s²]	−0.36	−0.61	−0.75	−0.61 ± 0.15