Figure 3.

Drop of average passing rates with respect to the clinical plan (no MLC positioning errors) with the introduction of random and systematic errors. The comparison was between Pinnacle calculated planar dose distribution and (a) film or (b) MapCHECK measurement using DTA $2\%/2\text{mm}$ and $3\%/3\text{mm}$ as well as γ $2\%/2\text{mm}$ and $3\%/3\text{mm}$ criterion. The x‐axis, from left to right, stands for no MLC positioning error, random errors and systematic errors of $\pm 1\text{mm}$ and $\pm 2\text{mm}$, respectively.