The present invention relates to an apparatus (10) for feature suppression in dark field or phase contrast X-ray imaging. The apparatus comprises an input unit (20), a processing unit (30) and an output unit (40). The input unit is configured to provide the processing unit with an X-ray attenuation image of a region of interest of an object. The input unit is also configured to provide the processing unit with a dark field or phase contrast X-ray image of the region of interest of the object. The processing unit is further configured to identify a first feature in the X-ray attenuation image； to identify a second anatomical feature in the X-ray attenuation image； and to identify the second anatomical feature in the dark field or phase contrast X-ray image. The first feature is an obscuring anatomical feature depicted in the X-ray attenuation image with higher contrast than in the dark field or phase contrast X-ray image. The processing unit is also further configured to register the dark field or phase contrast X-ray image to the X-ray attenuation image based on the identified second anatomical feature. The processing unit is configured to determine a location of the first feature in the X-ray attenuation image； and to locate the first feature in the dark field or phase contrast X-ray image comprising utilization of information relating to the first feature identified in the X-ray attenuation image by transferring the determined location to the dark field or phase contrast X-ray image. The processing unit is still further configured to suppress the first feature in the dark field or phase contrast X-ray image to generate a feature suppressed dark field or phase contrast X-ray image. And the output unit is configured to output data representative of the feature suppressed dark field or phase contrast X-ray image.La présente invention concerne un appareil (10) pour une suppression de caractéristique dans une imagerie radiologique sur fond noir ou à contraste de phase.
