X-ray imaging system

An X-ray imaging system comprising:

• an X-ray Talbot imaging device comprising:
• an X-ray source;
• a plurality of gratings;
• and
• an X-ray detector disposed in line in an X-ray emission axis direction, wherein
• the X-ray Talbot imaging device emits an X-ray from the X-ray source to the X-ray detector through a subject and the gratings, and takes an image of a same site of the subject multiple times at different subject set angles to capture, with the X-ray detector, moire images having the different subject set angles;
• and
• an image processing device comprising a hardware processor and a display, wherein
• the hardware processor:
• generates multiple types of reconstructed images based on each of the moire images having the different subject set angles captured by the X-ray Talbot imaging device;
• groups the multiple types of the reconstructed images by each of the subject set angles, and groups the multiple types of the reconstructed images by each of the types;
• detects, in each of the multiple types of the reconstructed images, a grating direction of the gratings and each of the subject set angles relative to the grating direction;
• matches an image direction in each of the grouped reconstructed images with a reference direction based on the detected grating direction and the detected subject set angle;
• performs a same image adjustment process on the grouped reconstructed images;
• and
• causes the display to display the reconstructed images grouped by each of the subject set angles or the reconstructed images grouped by each of the types.