Table 2: The dose variation in the overlapped region at various depths measured using EBT3 film strips placed in the solid water phantom slabs. Two dynamic field edges with 3 cm of leaf motion and gantry angles of 11° and 349° delivered a dose to a 20 cm-thick phantom with an overlap of 5.5 cm.

Depth (cm)051015

Dose variation in overlap region (%)98.4–103.8 99.3–10597.9–102.398.3–101.2