The present invention relates to a modulation of X ray radiation for the purposes of imaging an object of interest. For the modulation the X ray radiation provided by an X ray source (12) is in part totally reflected by a mirror (20). Thus an X ray radiation at an object receiving space (16) is formed by an unreflected X ray radiation (24) and a reflected X ray radiation (26). The mirror (20) is displaceable by an actuator (28) such that the intensity of the reflected X ray radiation (26) can be adjusted in particular to a density of the object to be imaged.
