X-ray system for differential phase-contrast imaging of an examination object with phase-stepping

摘要

The invention relates to an x-ray recording system for differential phase contrast imaging of an examination subject (6) by means of phase stepping with an x-ray emitter (3) for generating a beam path (12) of quasi-coherent x-rays, an x-ray image detector (4) with pixels arranged in a matrix, and a diffraction or phase grating (17), the X-ray emitter (3) having an X-ray tube with a cathode (20) and an anode (26). According to the invention, the x-ray tube is designed in such a way that an electron beam (21) emanating from the cathode (20) is assigned focusing electronics (22) which generate at least one linear electron beam fan (23, 24) of electrons hitting an anode (26) .