An imaging system intended for imaging fast-moving objects, comprising an X-ray source, a scintillating screen, a shutter and a detector of the beam emitted by the shutter, and a processing unit connected to the detector, where the shutter is positioned between the scintillator screen and the detector, and a support for the object to be observed is positioned downstream from the X-ray source and upstream from the scintillator screen, where the shutter is a shutter which can be controlled at high frequencies, for example higher than approximately 1 kHz, where the shutter is fixed and the transmission of the signal originating from the scintillator screen towards the detector is controlled by electrical polarization means controlled by a control unit.