Focus / detector system of an X-ray apparatus for producing phase-contrast images, associated X-ray system and storage medium and method for producing tomographic images

摘要

Focus / detector system (F, D) of an X-ray apparatus (1) for generating projective or tomographic phase-contrast images, at least consisting of: 1.1. a radiation source (2) having a focus (F) and a focus-side source grating (G), which is arranged in the beam path and generates a field of beam-wise coherent X-rays, 1.2. and a detector arrangement having a multiplicity of juxtaposed lattice / detector modules (GD) with lateral walls (14), in each case the lattice / detector modules (GDx) being arranged one behind the other in the beam direction: 1.2.1. at least one phase grating (G), for generating a first interference pattern, 1.2.2. an analysis grid (G), to generate another interference pattern, 1.2.3. wherein on one side between the phase grating (G) or the analysis grid (G2x) and the wall (14) a piezoelectric element (12) is arranged and on the opposite side a spring element (13) is present, 1.2.4. and areally arranged detector elements (D), 1.2.5. wherein the individual grid lines of all grids (G, G, G) are aligned parallel to each other, 1.2.6. and wherein an examination object (P, 7) is to be arranged between the source grid (G) and the phase grating (G).