Table 1.

Analysis of systematic errors and statistical dispersions in water, for a field of $6\times 6\hspace{0.17em}{\text{cm}}^2$ at 18 MeV and $\text{SSD}=100\hspace{0.17em}\text{cm}$. The statistical accuracy was 2% and the grid size was $2\times 2\hspace{0.17em}{\text{mm}}^2$.

Curve Region	Maximum Systematic Error	Maximum Statistical Dispersion
dmax – d80%	$-0.3\mathrm{\%}$	1.5%
d80% – d20%	−0.4 mm	−0.8 mm
d20% – end	0.2%	1.0%