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Bismuth germanate (BGO) shows good properties for PET applications, but was substituted by the development of faster crystals like Lutetium oxyorthosilicate (LSO) for time-of-flight PET (TOF-PET). Recent improvements in silicon photomultipliers (SiPM) and fast readout electronics make it possible to access the Cherenkov photon signal produced upon 511 keV interaction, which makes BGO a cost effective candidate for TOF-PET. Tails in the time delay distribution, however, remain a challenge. These are mainly caused by the high statisti