Figure 2.

LINAC jaw settings when the attached mMLC is used for IMRT delivery. Figure 2(a) shows the BestAll option, which sets the LINAC jaws to encompass each of the mMLC fields (per gantry angle). Figure 2(b) shows the Fixed option, which sets a fixed jaw position (e.g., $10\times 10{\text{cm}}^2$) for all the mMLC fields (per gantry angle).