Scanning system for differential phase contrast imaging

Abstract

The invention relates to the field of X-ray differential phase contrast imaging. For scanning large objects and for an improved contrast to noise ratio, an X-ray device () for imaging an object () is provided. The X-ray device () comprises an X-ray emitter arrangement () and an X-ray detector arrangement (), wherein the X-ray emitter arrangement () is adapted to emit an X-ray beam () through the object () onto the X-ray detector arrangement (). The X-ray beam () is at least partial spatial coherent and fan-shaped. The X-ray detector arrangement () comprises a phase grating () and an absorber grating (). The X-ray detector arrangement () comprises an area detector () for detecting X-rays, wherein the X-ray device is adapted to generate image data from the detected X-rays and to extract phase information from the X-ray image data, the phase information relating to a phase shift of X-rays caused by the object (). The object () has a region of interest () which is larger than a detection area of the X-ray detector () and the X-ray device () is adapted to generate image data of the region of interest () by moving the object () and the X-ray detector arrangement () relative to each other.