An X-ray imaging system for generating X-ray projections of an object, the X-ray imaging system comprising: an X-ray device having a single X-ray source for forming a plurality of X-ray beams by emitting X-rays from a number of locations , wherein the X-ray device comprises a single area being a common focal spot of a common X-ray tube and wherein the X-ray device comprises a grating configured to transmit X-rays only through its openings, wherein said openings are identical to said locations; a filter configured to be positioned within the plurality of X-ray beams; an object space where the object to be imaged is to be accommodated; and an X-ray detector including an array of a plurality of pixels ; wherein the X-ray device, the filter, and the plurality of pixels are configured such that at least one pixel is to be exposed to the plurality of X-ray beams, wherein each X-ray beam connects one of the locations with one of the pixels , respectively; wherein the filter comprises a filter grating forming a pattern of different X-ray filtration; wherein X-ray radiation which is to be received by a particular pixel is to undergo a same spectral filtration by the filter; wherein pixels which are to receive the X-ray radiation undergoing the same spectral filtration are to be summarized to a pixel subset; wherein at least two subsets of pixels receiving different spectral filtration are to exist; wherein said pattern for the filter grating is aligned to a pattern of the X-ray emission locations and to a geometry of the array of a plurality of pixels thereby assigning the subset of pixels; and wherein the filter is configured such that additionally to the at least two subsets of pixel receiving different spectral filtration at least one pixel subset represents an opaque filtration of X-rays such that at least one pixel subset of the plurality of pixels of the X-ray detector is shadowed from any direct X-ray radiation from the X-ray source of the X-ray device. an X-ray device having a single X-ray source for forming a plurality of X-ray beams by emitting X-rays from a number of locations , wherein the X-ray device comprises a single area being a common focal spot of a common X-ray tube and wherein the X-ray device comprises a grating configured to transmit X-rays only through its openings, wherein said openings are identical to said locations; a filter configured to be positioned within the plurality of X-ray beams; an object space where the object to be imaged is to be accommodated; and an X-ray detector including an array of a plurality of pixels ; wherein the X-ray device, the filter, and the plurality of pixels are configured such that at least one pixel is to be exposed to the plurality of X-ray beams, wherein each X-ray beam connects one of the locations with one of the pixels , respectively; wherein the filter comprises a filter grating forming a pattern of different X-ray filtration; wherein X-ray radiation which is to be received by a particular pixel is to undergo a same spectral filtration by the filter; wherein pixels which are to receive the X-ray radiation undergoing the same spectral filtration are to be summarized to a pixel subset; wherein at least two subsets of pixels receiving different spectral filtration are to exist; wherein said pattern for the filter grating is aligned to a pattern of the X-ray emission locations and to a geometry of the array of a plurality of pixels thereby assigning the subset of pixels; and wherein the filter is configured such that additionally to the at least two subsets of pixel receiving different spectral filtration at least one pixel subset represents an opaque filtration of X-rays such that at least one pixel subset of the plurality of pixels of the X-ray detector is shadowed from any direct X-ray radiation from the X-ray source of the X-ray device. <EOS>