Fig. 3
Example measurement of photon attenuation in a cylindrical phantom, using the intrinsic radioactivity of Lutetium in the detector crystals. Total deposited energy is presented within the rendered simulation (A) and as flattened histograms with photon energy windows of 100–900 keV (B) and 300–600 keV (C). These results use 2 × 107 simulated events, corresponding to ~ 1.3 s activity. Attenuation due to the 100 mm phantom is visible in the central region.