| 摘要 |
<p>A radiographic apparatus for capturing an X-ray fluoroscopic image p or a tomogram with high contrast by simply and accurately estimating the direct X-rays even though the radiographic apparatus further includes a compensation filter (5). The radiographic apparatus includes a direct X-ray attenuation fraction acquiring unit (12) for determining the attenuation fraction of the direct X-rays from the intensity of the direct X-rays entering the subject M and the intensity of the direct X-rays exiting the subject M. The attenuation fraction of the direct X-rays is determined assuming that the attenuation fraction of the primary indirect X-rays which is the ratio of attenuation of the primary indirect X-rays caused when the primary indirect X-rays generated by the compensation filter (5) pass through the subject M is equal to the attenuation fraction of the direct X-rays. With this, an X-ray imaging apparatus (1) and an X-ray imaging apparatus (37) for simply capturing an X-ray fluoroscopic image p or a tomogram without requiring conventional complex computation can be provided.</p> |
