Table 2.

The D/MU values from measurements with an ionization chamber (IC) and Monte Carlo simulations (MC) are shown in columns two and three. The column four lists the per cent differences between the corresponding values from each of the eight beams considered in this work. The per cent differences for all beams were within ±1%. Columns five and six show the D/MU values from Monte Carlo simulations in the eye model (Eye) listed with the corresponding corrected D/MU values in from the flat-faced water phantom (WP), respectively. The column on the far right lists the per cent difference between the ‘Eye’ and ‘WP’ columns.

Beam label	IC (cGy MU–1)	MC (cGy MU–1)	(MC-IC)/MC (%)	Eye (cGy MU–1)	WP (cGy MU–1)	(Eye-WP)/Eye(%)
1500	14.5	14.6	0.4%	14.4	14.7	–2.1%
2000	16.4	16.5	0.5%	16.3	16.6	–1.8%
3000	19.7	19.8	0.5%	19.6	20.0	–2.0%
4000	22.7	22.8	0.4%	22.4	22.9	–2.2%
2011	11.7	11.6	–0.8%	11.5	–	–
2020	8.4	8.4	0.2%	8.35	–	–
3015	13.1	13.0	–0.7%	12.9	–	–
3030	9.9	9.9	–0.6%	9.75	–	–