stored in an intermediate memory 25 the apparatus controller 12 not only controls the x ray source 3 the diaphragm system 7 and the detector arrangement 8 but also supplies exposure related radiation position and path data to a software stage 26 the software stage 26 also processes the image data of the sub images stored in the intermediate memory 25 that had been acquired with the detectors to a form a 34 raw image 34 this 34 raw image 34 is subsequently processed in a further software stage 27 to form an x ray image which is subsequently stored in a data bank 28 from the data band 28 for example the data image can be called via a pc and displayed on a monitor 30 advantageously the parameters necessary for an exposure can be generated by the pc 29 from the software stage 27 these being forwarded therefrom to the apparatus controller 12 the summation or integration needed for producing the tomograms can as shown ensue with the assistance of the ccds that are operated in the tdi mode the image thereby arises during the data acquisition on the basis of an 34 analog 34 summation within the active ccd area.