An irradiation method and in particular for imaging a region of investigation (2) of an object (1), comprises the steps of generating at least one energy input beam (3) with at least one energy input beam source (210), wherein at least one energy input beam (3) comprises a plurality of individual energy input beam components (3.1, 3.2, 3.3 and)And irradiating the region of investigation (2) with at least one energy input beam (3) along a plurality of projection directions and wherein the energy input beam components (3.1, 3.2, 3.3 and) are formed with at least one beam mask (211) made of an energy input shielding material with through holes. Furthermore and an imaging method and devices for irradiating or imaging the object are described.
