X-ray detection device and detection method

An X-ray detection device comprising:

• a scintillator configured to generate scintillation light based on incident X-rays, wherein
• the incident X-rays are emitted from an X-ray irradiation device that faces the X-ray detection device, and
• a subject is interposed between the X-ray detection device and the X-ray irradiation device;
• a detection unit including a plurality of pixels, wherein each pixel of the plurality of pixels is configured to generate a pixel signal based on the scintillation light incident on each pixel of the plurality of pixels;
• and
• an output unit configured to generate X-ray two-dimensional projection data of the subject based on a plurality of pixel signals that corresponds to the plurality of pixels, wherein
• the X-ray two-dimensional projection data includes intensity data of the incident X-rays,
• each pixel of the plurality of pixels of the detection unit includes:
• a plurality of subpixels configured to execute a photoelectric conversion based on the scintillation light;
• an analog to digital (AD) conversion unit configured to apply AD conversion to a plurality of outputs of the plurality of subpixels;
• and
• an adder configured to generate the pixel signal corresponding to a pixel of the plurality of pixels based on an addition of the plurality of outputs of the plurality of subpixels after the AD conversion, and
• the detection unit is configured to:
• calculate a first average value of a plurality of signals output from a subpixel of the plurality of subpixels prior to an exposure period of the scintillation light;
• calculate a second average value of a plurality of signals output from the subpixel after the exposure period;
• calculate a difference between the first average value and the second average value;
• and
• set the calculated difference as an output of the subpixel.