Fig. 2
From: Monte Carlo-based quantitative pinhole SPECT reconstruction using a ray-tracing back-projector
Maximum intensity projections of reconstructed point sources, in the x-y-plane, for the first, middle, and final source positions in the measurement grid. Line profiles are shown for the x- (solid), y-(dashed), and z- (dotted) directions with the positions of the former two marked by the red indicators. Each profile was normalized to have a maximum value of 1. The reconstructed point sources are symmetric in all directions, and no major artefacts are visible