1. A method of increasing resolution of nuclear imaging coincidence events comprising: emitting a gamma photon as the result of a coincidence event; receiving the gamma photon at a scintillating crystal, thereby causing a scintillation event; emitting electromagnetic radiation from the scintillation crystal in response to receiving the gamma photon, thereby producing emitted electromagnetic radiation; collecting the emitted electromagnetic radiation by a plurality of photo detectors; determining, by a processor, the location of the scintillating crystal based on information collected from the plurality of photo detectors; choosing, by the processor, only a subset of the photo detectors that are closer to the scintillating crystal for collecting the emitted electromagnetic radiation to improve timing coincidence window resolution and narrow a timing coincidence window of the coincidence event, thereby omitting more random events; and determining, by the processor, a time of a coincidence event corresponding to the emitted electromagnetic radiation.