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Percentage-depth-dose comparisons between gpenelope and ionization chamber measurement (spline interpolated) for field sizes 4.2 × 4.2, 10.5 × 10.5, and 27.3 × 27.3 cm2 at 100 cm SSD (a). Off-axis profile comparisons between gpenelope and radiochromic film measurement for field sizes 2.1 × 2.1, 4.2 × 4.2, 10.5 × 10.5, and 21.0 × 21.0 cm2 at depths of 5 (b), 10 (c), and 15 cm (d) at 100 cm SSD.
