| 摘要 |
<p>It is an object of this invention to provide an image acquisition apparatus which can acquire an image which prevents a stripe pattern originating from a scattered ray removing grid from interfering with observation when X-rays are-radiated by using the scattered ray removing grid. An image acquisition apparatus of the invention radiates X-rays by using a scattered ray removing grid (11) and two-dimensionally samples an X-ray transmission distribution on an object (2) to be imaged at desired sampling intervals. This apparatus includes an image acquisition means for acquiring an image by setting the intervals of elements of the scattered ray removing grid, without moving the scattered ray removing grid, such that the spatial frequency of a stripe pattern, in the image, which originates from the scattered ray removing grid becomes 40% or more of a sampling frequency that is the reciprocal of the sampling intervals.</p> |
