X-ray ct device and medical information management device

An X-ray CT device comprising:

• an X-ray tube;
• a detector configured to detect a transmitted X-ray emitted from the X-ray tube and transmitted through a subject;
• image reconstruction circuitry configured to, in positioning imaging performed at a first tube current, reconstruct a positioning image from projection data collected based on a detection signal of the transmitted X-ray from the detector;
• storage configured to store information pieces relating to a plurality of body parts of the subject, a plurality of image quality levels for each of the information pieces relating to the body parts, and information relating to a first X-ray count value corresponding to each of the image quality levels in an associated manner;
• and
• processing circuitry configured to detect a plurality of body parts of the subject included in the positioning image, select a desired body part and an image quality level corresponding to the desired body part, acquire information relating to a second tube current in main imaging based on information relating to the first tube current, information relating to a second X-ray count value in the positioning imaging, and information relating to the first X-ray count value associated with the selected image quality level, and control the X-ray tube to execute the main imaging based on the acquired second tube current.