The phase contrast X-ray imaging system according to claim 1, wherein the detector is curved.ġ0. The phase contrast X-ray imaging system according to claim 1, wherein the illumination passes through a single grating before being detected by the detector.ĩ. The phase contrast X-ray imaging system according to claim 1, wherein the system does not include an absorption grating.Ĩ. The phase contrast X-ray imaging system according to claim 1, wherein the diffraction grating contains a plurality of grating elements, wherein the grating elements have a varying pitch and a varying height, wherein the varying pitch and the varying height impart the additional phase dependence on the illumination passing through the diffraction grating.ħ. The phase contrast X-ray imaging system according to claim 1, wherein the diffraction grating includes a plurality of grating elements, wherein the grating elements have a varying pitch that imparts the additional phase dependence on the illumination passing through the diffraction grating.Ħ. The phase contrast X-ray imaging system according to claim 1, wherein the grating imparts a position-dependent spherical phase.ĥ. The phase contrast X-ray imaging system according to claim 1, wherein the diffraction grating imparts a position-dependent quadratic phase, wherein the position-dependent quadratic phase is proportional to a square of a transverse distance from a pre-determined position on the diffraction grating in a first dimension and in a second dimension.Ĥ. The phase contrast X-ray imaging system according to claim 1, wherein the diffraction grating imparts a position-dependent quadratic phase, wherein the position-dependent quadratic phase is proportional to a square of a transverse distance from a pre-determined position on the diffraction grating in a first dimension.ģ. A phase contrast X-ray imaging system comprising: an illumination source adapted to illuminate a region of interest a diffraction grating adapted to receive illumination from the illuminated region of interest, the diffraction grating comprising a spatial structure having a first periodicity superimposed with a second periodicity that is different from the first periodicity and a detector adapted to detect illumination passing through the diffraction grating, wherein the spatial structure is defined by varying height and/or pitch, and wherein the spatial structure imparts a first phase dependence based on the first periodicity and an additional phase dependence based on the second periodicity on the illumination passing through the diffraction grating.Ģ.
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