Radial distribution of the reconstructed photon conversion points for $|\eta|< 0.9$ (black) compared to MC simulations performed with PHOJET (red). Distributions for true converted photons are shown in yellow. Physics contamination from true ${\rm \pi^0}$ and $\eta$ Dalitz decays, where the primary $e^+e^-$ are reconstructed as photon conversions, are shown as dashed blue histograms. Random combinatorics and true hadronic background are also shown.