X-ray image acquisition device and X-ray image acquisition system

An X-ray image acquisition device for acquiring an X-ray image of an object transported along a first direction, comprising:

• a pixel unit having M (M is an integer of 2 or more) pixel arrays each including N (N is an integer of 2 or more) pixel portions for detecting X-rays, the N pixel portions being arranged along the first direction and the M pixel arrays being arranged along a second direction perpendicular to the first direction;
• M circuit units provided corresponding to the M pixel arrays;
• and
• a control unit configured to control the M circuit units,
• wherein each of the M circuit units includes:
• T (T is an integer of N or more) adding sections configured to sequentially add electrical signals corresponding to output signals from the N pixel portions of the corresponding pixel array;
• and
• a switch section configured to switch connection states between the N pixel portions and the T adding sections, and
• for each of the M circuit units, the control unit switches the connection states between the N pixel portions and the T adding sections in synchronization with transportation of the object along the first direction so that the electrical signals corresponding to the output signals output from the pixel portions by detecting X-rays transmitted through the same region of the object are added by the same adding sections.