Radiation-phase-contrast imaging device

A radiation phase-contrast imaging device comprising:

• a radiation source configured to irradiate high energy radiation and low energy radiation;
• a grating in which an absorber absorbing radiation and extending in one direction is arranged in a direction perpendicular to the one direction, the absorber generating Talbot interference when the radiation transmits therethrough;
• a detection unit including a high energy radiation detection surface configured to detect a self-image of the grating related to the high energy radiation and a low energy radiation detection surface configured to detect a self-image of the grating related to the low energy radiation;
• and
• a position changing unit configured to change a relative position of an imaging system and an object so that a projection of the object moves on the detection surface while keeping a positional relationship of the radiation source, the grating, and the detection unit, the imaging system being configured by the radiation source, the grating, and the detection unit.