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(a) The calibration curve for EBT film to 6 MV radiation. (b) After the PRESAGE™ dosimeter was scanned by optical-CT, it was cut into four axial sections. The locations of the cut planes correspond to the optimal representations of the upset, neutral, and happy face representations shown in Fig. 1. EBT films (∼16 cm diameter) were inserted at the cut planes, as shown, to provide independent measurement of the planar dose distributions in these planes.
