| 摘要 |
An X-ray tube and an X-ray area detector are driven synchronously in scanning action to revolve about a scan axis extending substantially through the center of a region of interest of an object under examination. An image processor performs a predetermined image processing on projection data detected in each scan position. In the image processing, a low-pass filtering is applied to projection data in each row of pixels of the area detector perpendicular to a direction corresponding to the scan axis, the low-pass filtering being in accordance with a location on the scan axis to which each row of pixels is projected. This filtering reduces artifacts due to a volume scan mode appearing in three-dimensional volume data of the region of interest generated by projecting the projection data after the low-pass filtering back to a virtual three-dimensional lattice.
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