The brass top and cap miniphantom designs used in this study. (a) and (b) 3, 5, and 7 mm diameter dmax tops and 11 mm diameter dmax cap and, (c) and (d) 7 mm diameter d100 top and 11 mm diameter d100 cap.
Sc for MLCs measured using 60012 diode with 11 mm wide caps and 7 mm wide tops. The equivalent heights of the caps and tops are either dmax or d100. The uncertainty bars are smaller than the symbols used.
Sc for (a) MLCs and (b) cone collimation measured using 60012 diode with tops of width 3, 5, and 7 mm and an ionization chamber with 11 mm cap. The equivalent heights of the tops and cap are dmax. The uncertainty bars are smaller than the symbols used.
Sc for cone collimation measured using the 60012 diode, SFD diode, FOD and EBT2 film with 3 mm wide tops with equivalent height dmax. Monte Carlo calculated Sc are also shown. The uncertainty bars represent one standard deviation.
The external dimension and sensitive volume dimensions of each detector used in this study.
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