Figure 7.

Schematic lateral projections (LAT); (a) Phantom is at iso-center position: $\widehat{ACB}$ is a curved projection plane and $\overline{AB}$ is a flat projection plane; (b) Phantom is at an off-center position: $\widehat{DEF}$ is the curved projection plane and $\overline{DG}$ is the flat projection plane.