1. An imaging system comprising: an array of radiation detectors which performs a data acquisition by detecting radiation events; a coincidence processor connected with detectors of the array of radiation detectors by wiring circuits, the coincidence processor dynamically adjusting at least one of an energy window and a time window based on feedback about the data acquisition obtained during the data acquisition and selecting the detected events satisfying the dynamically adjusted energy and time windows to define coincident pairs of events; a list memory which records the coincident event pairs; and a reconstruction processor which reconstructs the coincident pairs into an image representation.