A system (1010, 2000) for attenuation image acquisition and/or calibration data acquisition and/or X-ray dark field acquisition and/or phase contrast acquisition, the system comprising: - an X-ray source; - an interferometer arrangement; - an X-ray detector; - a control unit; - a processing unit; and - an output unit; wherein, an axis is defined extending from a centre of the X-ray source to a centre of the X-ray detector; wherein, an examination region is located between the X-ray source and the X-ray detector, wherein the axis extends through the examination region, and wherein the examination region is configured to enable location of an object to be examined; wherein, the interferometer arrangement is located between the X-ray source and the X-ray detector, and wherein the interferometer arrangement comprises a first grating and a second grating; characterised in that the system further comprises at least one vibration transducer, and in that: the control unit is configured to control the X-ray detector to acquire each image data of a plurality of image data whilst the first grating and/or second grating is moving during an exposure time of the X-ray detector; the control unit is configured to control the at least one vibration transducer to vibrate the first grating and/or second grating, wherein an amplitude of vibration is greater than or equal to the period of the first grating and/or second grating; the processing unit is configured to generate attenuation image data and/or calibration data comprising a determination of a temporal low-pass filtered version of at least some of the plurality of image data; and the output unit is configured to output the attenuation image data and/or the calibration data. - an X-ray source; - an interferometer arrangement; - an X-ray detector; - a control unit; - a processing unit; and - an output unit; wherein, an axis is defined extending from a centre of the X-ray source to a centre of the X-ray detector; wherein, an examination region is located between the X-ray source and the X-ray detector, wherein the axis extends through the examination region, and wherein the examination region is configured to enable location of an object to be examined; wherein, the interferometer arrangement is located between the X-ray source and the X-ray detector, and wherein the interferometer arrangement comprises a first grating and a second grating; characterised in that the system further comprises at least one vibration transducer, and in that: the control unit is configured to control the X-ray detector to acquire each image data of a plurality of image data whilst the first grating and/or second grating is moving during an exposure time of the X-ray detector; the control unit is configured to control the at least one vibration transducer to vibrate the first grating and/or second grating, wherein an amplitude of vibration is greater than or equal to the period of the first grating and/or second grating; the processing unit is configured to generate attenuation image data and/or calibration data comprising a determination of a temporal low-pass filtered version of at least some of the plurality of image data; and the output unit is configured to output the attenuation image data and/or the calibration data. wherein, an axis is defined extending from a centre of the X-ray source to a centre of the X-ray detector; wherein, an examination region is located between the X-ray source and the X-ray detector, wherein the axis extends through the examination region, and wherein the examination region is configured to enable location of an object to be examined; wherein, the interferometer arrangement is located between the X-ray source and the X-ray detector, and wherein the interferometer arrangement comprises a first grating and a second grating; characterised in that the system further comprises at least one vibration transducer, and in that: the control unit is configured to control the X-ray detector to acquire each image data of a plurality of image data whilst the first grating and/or second grating is moving during an exposure time of the X-ray detector; the control unit is configured to control the at least one vibration transducer to vibrate the first grating and/or second grating, wherein an amplitude of vibration is greater than or equal to the period of the first grating and/or second grating; the processing unit is configured to generate attenuation image data and/or calibration data comprising a determination of a temporal low-pass filtered version of at least some of the plurality of image data; and the output unit is configured to output the attenuation image data and/or the calibration data. the control unit is configured to control the X-ray detector to acquire each image data of a plurality of image data whilst the first grating and/or second grating is moving during an exposure time of the X-ray detector; the control unit is configured to control the at least one vibration transducer to vibrate the first grating and/or second grating, wherein an amplitude of vibration is greater than or equal to the period of the first grating and/or second grating; the processing unit is configured to generate attenuation image data and/or calibration data comprising a determination of a temporal low-pass filtered version of at least some of the plurality of image data; and the output unit is configured to output the attenuation image data and/or the calibration data.