Figure 1.

(Color) (a) The extrapolation of the graph of integrated dose versus leaf gap gives the offset of the leaf gap required as the dosimetric leaf separation value (6 and 10 MV were 0.97 and 1.79 mm, respectively). (b) The dose deviation (given as difference in measured and expected output) at a range of dosimetric leaf separations for 6 and 10 MV (6 and 10 MV were 1.05 and 1.65 mm, respectively).