Grating for phase-contrast imaging

A grating for X-ray differential phase-contrast imaging, comprising:

• a first sub-grating;
• and
• at least a second sub-grating, the sub-gratings each comprising a body structure with bars, and gaps, arranged periodically with a pitch,
• said sub-gratings being arranged consecutively for receiving an X-ray beam and being positioned laterally displaced from each other, wherein the pitch of one of said sub-gratings is a multiple of the pitch of another one of said sub-gratings.

A grating for X-ray differential phase-contrast imaging, comprising:

• a first sub-grating;
• and
• at least a second sub-grating, the sub-gratings each comprising a body structure with bars, and gaps, arranged periodically with a pitch,
• said sub-gratings being arranged consecutively for receiving an X-ray beam and being positioned laterally displaced from each other, wherein said sub-gratings each has a height that creates a π-phase shift at a design wavelength.

A grating for X-ray differential phase-contrast imaging, comprising:

• a first sub-grating;
• and
• at least a second sub-grating, the sub-gratings each comprising a body structure with bars, and gaps, arranged periodically with a pitch,
• said sub-gratings being arranged consecutively for receiving an X-ray beam and being positioned laterally displaced from each other, said sub-gratings being arranged on a single wafer.