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. 2016 Jan 20;16(1):45–56. doi: 10.1177/1533034615626011

Figure 6.

Figure 6.

A, The calibration curve for dose delivered on the Gafchromic EBT-2 film exposed to clinical 6 MV X-ray beam using cubic polynomial fit, with error bar representing uncertainty in film measurement. Inset shows the similar plot for 4-mm collimator. B, Dose rate variation with depth in a solid water setup at 32.5 cm source to surface distance (SSD) for 0.5 and 1 mm diameter and 2 × 2 mm2 and 4 × 4 mm2 collimators. C, Relative beam profiles at 1 cm depth in a solid water setup at 32.5 cm SSD for 0.5 and 1 mm diameter and 2 × 2 mm2 and 4 × 4 mm2 collimators (225 kVp, 13 mA photon beam). D, Cross-beam profiles at depths of 0, 18.6, and 37.2 mm for a 0.5-mm-diameter collimator. E, Normalized beam profiles for 2 × 2 mm2 collimator at depths of 0, 18.6, and 37.2 mm.