| 摘要 |
<p>For the purpose of more effectively reducing the influence by scatter rays and improving image quality of a tomographic image, an X-ray CT apparatus (10) used as a radiation computed tomographic imaging apparatus comprises an X-ray detector (70) for detecting projection data of a subject (1) generated by X-rays emitted from an X-ray source (XL) around a predefined axis of rotation and passing through the subject (1), and a calculation/control apparatus (23) for generating tomographic image data for a tomographic image of the subject (1) based on the projection data; wherein the X-ray detector (70) comprises: a plurality of detector channels (ch) for detecting the radiation, extending in a two-dimensional manner in two arrangement directions, i.e., in channel and column directions, the channel direction being contained in a plane of rotation of the X-ray source (XL), the column direction being orthogonal to the channel direction and aligned along the axis of rotation; and collimators for confining an angle at which X-rays impinge upon the detector channels (ch), provided at borders between the detector channels (ch) adjoining in the column direction. <IMAGE></p> |
