| 摘要 |
PROBLEM TO BE SOLVED: To provide a radiographic apparatus obtaining a minute phase differential image having no noise.SOLUTION: This radiographic apparatus includes: an X-ray detector detecting X-rays emitted from an X-ray source and transmitted through a subject to generate image data; a grating part disposed between the X-ray source and the X-ray detector, and having grating lines of a prescribed direction; a phase differential image generation part 40 generating a phase differential image based on the image data 51, 52 obtained by the X-ray detector; an unwrapping processing part 41 applying unwrapping processing to the phase differential image; an offset removal part 43 subtracting an offset image representing offset noise when the subject is absent from the phase differential image after the unwrapping processing; a phase contrast image generation part 44 generating a phase contrast image by integrating the phase differential image from which the offset noise is removed in an integration direction perpendicular to the grating lines; and a trend removal part 45 detecting and removing a trend that is a noise component remaining in the phase contrast image. |
