Figure 3.

The impact of translational setup errors on dosimetric verification of 11 VMAT plans using ArcCHECK and ${\text{Delta}}^4$ phantoms in (a) RL, (b) SI, and (c) AP directions. The simulated translational setup errors are 1, 2, 3, ‐1, ‐2, and ‐3 mm, respectively. The decreased pass rates of γ analysis from the original results are assessed with the 3%/3 mm criteria.