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Abstract

A radiation imaging system includes first and second gratings, a scanning system, a detector, an image generator, a storage, and a correction processing section. The first grating includes first grating modules arranged cylindrically about a virtual line. The virtual line passes through a focal point. The second grating includes second grating modules arranged cylindrically and coaxially about the virtual line with a larger radius. Grating lines of the first and second gratings are parallel with the virtual line. The scanning mechanism scans the second grating orthogonally to the virtual line. The detector is divided into segments corresponding to the second grating modules. The storage stores an offset value, per segment, corresponding to an inclination angle of the second grating module relative to scanning. The correction processing section corrects a phase differential image on a segment-by-segment basis based on the offset value.

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First Claim