Apparatus for generating X-ray imaging data

A method for generating X-ray imaging data, comprising:

• positioning a first grating, a second grating, and a third grating, wherein the first grating, the second grating, and the third grating are respectively positioned between an X-ray source and an X-ray detector;
• and
• positioning an object between the first grating and the third grating;
• wherein (1) either the first or the third grating has a pitch attribute of a constant grating pitch, (2) each grating of an adjacent pair of the first, second and third gratings has a pitch attribute of a varying grating pitch, and (3) each grating of an adjacent pair of the first, second and third gratings is bent such that a distance between the two adjacent gratings is constant as a function of fan angle, such that fringe patterns generated by a plurality of slits of the first grating line up at a position of the third grating;
• and
• detecting by the X-ray detector X-rays transmitted by the X-ray source.

A non-transitory computer-readable medium for storing executable instructions, which when executed by at least one processor, cause the at least one processor to perform a method for generating X-ray imaging data, the method comprising:

• positioning a first grating, a second grating, and a third grating, wherein the first grating, the second grating, and the third grating are respectively positioned between an X-ray source and an X-ray detector;
• and
• positioning an object between the first grating and the third grating;
• wherein (1) either the first or the third grating has a pitch attribute of a constant grating pitch, (2) each grating of an adjacent pair of the first, second and third gratings has a pitch attribute of a varying grating pitch, and (3) each grating of an adjacent pair of the first, second and third gratings is bent such that a distance between the two adjacent gratings is constant as a function of fan angle, such that fringe patterns generated by a plurality of slits of the first grating line up at a position of the third grating;
• and
• detecting by the X-ray detector X-rays transmitted by the X-ray source.