Radiation detection device

A radiation detection device comprising:

• a circuit board;
• a light receiving sensor provided on the circuit board and having a light receiving region and a circuit region;
• a fiber optic plate provided on the light receiving sensor;
• a scintillator layer provided on the fiber optic plate;
• and
• a plurality of wires laid across the circuit region and the circuit board,
• wherein the fiber optic plate includes
• a first portion facing the light receiving region and fixed to the light receiving sensor, and
• a second portion facing the circuit region while separated from the light receiving sensor,
• the first portion includes a first surface and a second surface opposing each other in a thickness direction of the circuit board, the first surface being a light incident surface on a side opposite to the light receiving sensor, and the second surface being a light emitting surface on the light receiving sensor side,
• one end of each of the plurality of wires is connected to the circuit region in a region between the light receiving sensor and the second portion,
• other end of each of the plurality of wires is connected to the circuit board,
• when seen in the thickness direction of the circuit board, in all of the plurality of wires, the other end of each of the plurality of wires is located inside an outer edge of the fiber optic plate,
• a distance between an end portion of the light receiving sensor and the second portion in the thickness direction of the circuit board is greater than a thickness of the light receiving sensor,
• the distance between the first surface and the second surface is greater than a thickness of the scintillator layer,
• the first portion includes a plurality of first optical fibers, the second portion includes a plurality of second optical fibers, and a direction in which each of the plurality of second optical fibers extends is parallel to a direction in which each of the plurality of first optical fibers extends, and
• at least a part of a surface of the second portion on the light receiving sensor side faces the plurality of wires while separated from the light receiving sensor, the surface including emission ends of the plurality of second optical fibers.