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(a) Orientation of 0° (AP) and 270° (lateral) projections relative to patient. Geometry not to scale. (b) Primary and scatter images of energy deposited in the detector for Geant4 and Acuros for the 0° projection. Primary images are shown on the same log scale, while the scatter images are shown on the same linear scale. (c) Horizontal line profiles of scatter fraction across central row. [Color figure can be viewed at wileyonlinelibrary.com]
