Figure 2From: Fast 3D dosimetric verifications based on an electronic portal imaging device using a GPU calculation engineThe central point dose values of the square-field results for the ion chamber (black points), the EPID before correction (dashed lines) and the EPID after correction (solid lines) for a) the 6 MV photon beam and b) the 10 MV photon beam. The relative doses were normalized to the central dose of the 10 cm × 10 cm field.Back to article page