1. A radiology device, comprising: an X-ray source for exposing a subject to radiation from said source; means for converting the X-rays into optical images so as to form primary optical images; a combination of n modules, n being an integer equal to or greater than two, each module forming a secondary optical image, each module having a module range of intensities expressed as the ratio between the maximum intensity which, can be detected and the minimum intensity which can be detected, each module having a gain from an image intensifier; n−1 beam splitters, each beam splitter transmitting a transmitted beam of an intensity equal to a given ratio of an intensity of an incident beam and reflecting a reflected beam of an intensity equal to a remainder of the intensity of the incident beam; each beam splitter being further arranged so that the beam respectively reflected by the beam splitter is directed onto a module associated to the beam splitter, and the beam respectively transmitted by the beam splitter is directed to another beam splitter or another module, the radiology device further comprising: means for retrieving the n secondary images formed by the modules and for combining them on a time-coherent basis; and means for displaying the secondary images to a user, wherein each module is selectively and temporarily gated, each module being gated during a time window defining a specific gate conversion factor, the radiology device further comprising synchronizing means, connected to the x-ray source and to each module, for synchronizing the gating of each module with an x-ray pulse from the x-ray source, wherein each module comprises: an optical chain, comprising in succession, from an output of the means for converting to an output of the module: an assembly for optical intensification of the images; and a photosensitive matrix sensor for forming said secondary images.