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Figure 3: Schematic of DLG measurement using electronic portal imaging device (DLGEPID). (A) Gantry (B) MLC with collimator at 90o (C) Direction of sweeping beam (D) aSi-EPID at SDD of 105 cm (E) EXaCT arm

Figure 3: Schematic of DLG measurement using electronic portal imaging device (DLG<sub>EPID</sub>). (A) Gantry (B) MLC with collimator at 90<sup>o</sup> (C) Direction of sweeping beam (D) aSi-EPID at SDD of 105 cm (E) EXaCT arm