349437.fig.005a
(a)
349437.fig.005b
(b)
Figure 5: When these two dose distributions are normalized at their cross hair isocenter, the 88% region of the interested planning isodose curve’s Ds is 1.9852, and the 88% region of the interested film isodose curve’s Ds is 1.9841. The discrepancy is only . The planning 88% isodose curve and film 88% isodose curve are supposed to be identical if the difference between their values is within 1%.