FIGURE 3.
Various event types used in the study; the red solid lines represent lutetium oxyorthosilicate (LSO) transmission event photons at 202 and 307 keV with absolute time‐of‐flight (TOF) difference ΔT0. The blue line shows a sample pair of annihilation photons with absolute TOF difference ΔT1. The solid green line shows a pair of annihilation photons where one photon gets absorbed in the object and the other photon undergoes a Compton backscatter and reaches a detector on the other side with energy 170 keV, as shown with the dashed green line