Research Article

Surface and Buildup Region Dose Measurements with Markus Parallel-Plate Ionization Chamber, GafChromic EBT3 Film, and MOSFET Detector for High-Energy Photon Beams

Figure 3

Percentage depth doses (PDDs) for normally incident 6 MV photon beams at open fields with different sizes at 100 cm fixed SSD. The doses at 0, 1, 2, 3, 4, and 5 mm effective depths for each dosimeter were calculated by interpolation, and the following field sizes were investigated: 5 × 5 cm2 (a), 10 × 10 cm2 (b), and 20 × 20 cm2 (c).