Patent ID: 7486770

Claim:
A focus-detector arrangement of an X-ray apparatus for generating at least one of projective and tomographic phase contrast recordings of a subject, comprising: a radiation source with a focus, arranged on a first side of the subject, to generate a fan-shaped or conical beam of X-rays; at least one X-ray optical grating arranged in the beam path, with at least one phase grating arranged on an opposite second side of the subject in the beam path to generate an interference pattern of the X-radiation; and an analysis-detector system to detect at least the interference pattern generated by the phase grating in respect of its phase shift with position resolution, wherein the at least one X-ray optical grating comprises bars which are free from overhangs forming shadows in the beam path of the fan-shaped or conical beam of rays, wherein the at least one X-ray optical grating is designed to be curved around the focus at least in a first section plane.