Table 3.

The absolute percent relative error (%RE) for the predicted profiles for all different combination of input and output data combinations. The mean absolute %RE shows for both the whole profile as well as within the central 80% of the profile based on the size of the predicted field.

			Absolute %RE
			Full profile		80% of field size
Energy	Input Field Size	Output field size	Mean*	Max	Mean*	Max
6 MV WFF	10×10	30×30	0.87 ± 0.79	3.76	0.14 ± 0.16	0.61
	30×30	10×10	1.33 ± 1.11	4.90	0.09 ± 0.05	0.18
10 MV WFF	10×10	30×30	0.66 ± 0.38	1.68	0.08 ± 0.04	0.16
	30×30	10×10	1.03 ± 0.81	4.05	0.11 ± 0.09	0.31
15 MV WFF	10×10	30×30	0.71 ± 0.36	1.60	0.11 ± 0.08	0.35
	30×30	10×10	1.22 ± 1.02	3.98	0.13 ± 0.13	0.56
6 MV FFF	10×10	30×30	0.79 ± 0.52	2.25	0.17 ± 0.14	0.43
	30×30	10×10	1.20 ± 0.78	3.90	0.13 ± 0.14	0.6
10 MV FFF	10×10	30×30	0.93 ± 0.45	1.79	0.14 ± 0.14	0.52
	30×30	10×10	0.82 ± 0.42	1.54	0.04 ± 0.03	0.14

Note: WFF = With flattening filter, FFF = Flattening filter free.

^*Data are shown as means± standard deviations.