1. System detecting gamma radiation, such as a gamma camera, including a source of gamma rays, at least one plate P 1 of a fast scintillator, the rise time thereof to the light peak being less than 1 ns with a scattering entry surface and a polished exit surface, having a thickness less than or equal to 10 mm, equipped with photodetectors and dedicated reading microelectronics, characterised in that the dedicated reading microelectronics are of the ASIC type, in that the detector is segmented, in that on said plate P 1 , each segment of said detector is suitable for measuring a first trigger T 1 , corresponding to the time of impact of the first UV ray emitted by scintillation onto said plate P 1 such that a lower time resolution is less than 100 ps, preferably less than 20 ps, in that the detector is suitable for measuring a spatial and time distribution of the first adjacent photons emitted by an event on the detectors for a time of more than 100 ps and less than or equal to the rise time to the light peak of the scintillator thus suitable for spatially situating said event “e1” having the coordinates (X1, Y1) and in that the detector is further suitable for processing spatial and time distribution differences between unscattered photons and scattered photons so as to reconstruct the spatiotemporal coordinates (X, Y, Z, T) of said scintillation event.