Figure 2

Reconstruction images; (a) with full FOV, (b) with no masking and no ray-passing correction, (c) with masking correction only ( p^’ = 0.2),  (d) with both corrections and ( p^' = 0.2 and R ( γ , β^') = 0.55), (e) with both corrections with broader reconstruction and ( p^' = 0.2 and  R ( γ,  β^') = 0.35), and (f) the overlapped image between (a) and (e). The image (a) was reconstructed with 4 mm/rotation, whereas the others were reconstructed with 7.2 mm/rotation which can depend on the treatment plan.