X-ray imaging device

An X-ray imaging device comprising:

• an X-ray tube that emits X-rays to a subject;
• a shielding mask which is disposed between the X-ray tube and the subject and in which X-ray transmitting portions extending in a first direction are arranged parallel in a second direction perpendicular to the first direction;
• an X-ray detector that detects X-rays transmitted by the X-ray transmitting portions and outputs an X-ray detection signal;
• a moving mechanism that moves a relative position of the X-ray detector and the shielding mask in the second direction;
• an X-ray emission control unit that performs control of causing the X-ray tube to repeatedly emit X-rays while the moving mechanism moves the relative position;
• an image generating unit that generates an X-ray image using the X-ray detection signal output from the X-ray detector every emission of X-rays from the X-ray tube;
• a refraction information calculating unit that calculates X-ray refraction information including a refraction direction and a refraction angle of X-rays based on the X-ray image generated by the image generating unit;
• and
• a scattered image reconstructing unit that reconstructs a small-angle X-ray scattered image mirroring an X-ray refraction contrast image of the subject based on the X-ray refraction information,
• wherein the X-ray detector comprises a scintillator layer including light-shielding walls in a lattice shape and scintillator elements that are disposed in cells which are defined in a two-dimensional matrix shape by the light-shielding walls and convert incident X-rays into light, and
• an output layer in which pixels that convert light converted by the scintillator elements into electric charges are arranged in a two-dimensional matrix shape.

An X-ray imaging device comprising:

• an X-ray tube that emits X-rays to a subject;
• a shielding mask which is disposed between the X-ray tube and the subject and in which X-ray transmitting portions extending in a first direction are arranged parallel in a second direction perpendicular to the first direction;
• an X-ray detector that detects X-rays transmitted by the X-ray transmitting portions and outputs an X-ray detection signal;
• an image generating unit that generates an X-ray image using the X-ray detection signal output from the X-ray detector;
• a refraction information calculating unit that calculates X-ray refraction information including a refraction direction and a refraction angle of X-rays based on the X-ray image generated by the image generating unit;
• and
• a scattered image reconstructing unit that reconstructs a small-angle X-ray scattered image mirroring an X-ray refraction contrast image of the subject based on the X-ray refraction information,
• wherein the X-ray detector comprises a scintillator layer including light-shielding walls in a lattice shape and scintillator elements that are disposed in cells which are defined in a two-dimensional matrix shape by the light-shielding walls and convert incident X-rays into light, and
• an output layer in which pixels that convert light converted by the scintillator elements into electric charges are arranged in a two-dimensional matrix shape, and
• positions of the X-ray transmitting portions and the X-ray detector are set such that an area in which the X-rays are incident on the X-ray detector overlaps two or more scintillator elements in the second direction.

An X-ray imaging device comprising:

• an X-ray tube that emits X-rays to a subject;
• a shielding mask which is disposed between the X-ray tube and the subject and in which X-ray transmitting portions are arranged in a two-dimensional matrix shape in two directions perpendicular to each other;
• an X-ray detector that detects X-rays transmitted by the X-ray transmitting portions and outputs an X-ray detection signal;
• an image generating unit that generates an X-ray image using the X-ray detection signal output from the X-ray detector;
• a refraction information calculating unit that calculates X-ray refraction information including a refraction direction and a refraction angle of X-rays based on the X-ray image generated by the image generating unit;
• and
• a scattered image reconstructing unit that reconstructs a small-angle X-ray scattered image mirroring an X-ray refraction contrast image of the subject based on the X-ray refraction information,
• wherein the X-ray detector comprises a scintillator layer including light-shielding walls in a lattice shape and scintillator elements that are disposed in cells which are defined in a two-dimensional matrix shape by the light-shielding walls and convert incident X-rays into light, and
• an output layer in which pixels that convert light converted by the scintillator elements into electric charges are arranged in a two-dimensional matrix shape, and
• positions of the X-ray transmitting portions and the X-ray detector are set such that an area in which the X-rays are incident on the X-ray detector overlaps two or more scintillator elements in the two directions perpendicular to each other.