| 摘要 |
An X-ray CT device according to an embodiment comprises an intensity distribution data collection unit (14a), a scan control unit (33), a count result collection unit (14b) and an image reconstruction unit (36). The intensity distribution data collection unit (14a) collects, in a first scan, intensity distribution data of X-rays that are emitted from an X-ray tube (12) and penetrate a subject. The scan control unit (33) estimates the amount of X-rays for which individual X-ray photons that penetrate the subject can be distinguished on the basis of the intensity distribution data and irradiates the subject with the estimated amount of X-rays from the X-ray tube (12) to perform a second scan for a photon counting CT. The count result collection unit (14b) collects, in the second scan, the count results in which X-ray photons that are emitted from the X-ray tube (12) and penetrate the subject are counted. The image reconstruction unit (36) reconstructs X-ray CT image data on the basis of the count results. |
