The present invention relates to a system (10) for X-ray dark field, phase contrast and attenuation tomosynthesis image acquisition. The system comprises an X-ray source (20), an interferometer arrangement (30), an X-ray detector (40), a control unit (50), and an output unit. A first axis is defined extending from a centre of the X-ray source to a centre of the X-ray detector. An examination region is located between the X-ray source and the X-ray. The first axis extends through the examination region, and the examination region is configured to enable location of an objection to be examined. The interferometer arrangement is located between the X-ray source and the X-ray detector. The interferometer arrangement comprises a first grating (32) and a second grating (34). A second axis is defined that is perpendicular to a plane that is defined with respect to a centre of the first grating and/or a centre of the second grating. The control unit is configured to control movement of the X-ray source and/or movement of the X-ray detector to provide a plurality of image acquisition states, wherein the X-ray source and X-ray detector are configured to operate to acquire image data. For each of the plurality of image acquisition states the first axis extends through the examination region at a different angle. The control unit is configured to control movement of the first grating or movement of the second grating in a lateral position direction perpendicular to the second axis. For each of the acquisition states the first grating or second grating is at a different lateral position of a plurality of lateral positions. The output unit is configured to output one or more of: dark field image data, phase contrast image data, and attenuation image data.
