| 摘要 |
A tomographic image of a subject is generated from projection image data acquired in a series of image capturing processes carried out by a radiation detector based on radiation emitted from a radiation source and transmitted through the subject. An extrapolating process is performed on each of the projection image data along a prescribed direction, and a smoothing process is performed on each of the projection image data along a direction perpendicular to the prescribed direction, thereby determining values of a plurality of pixels in non-detecting regions, which do not belong to a detecting region of the radiation detector. The determined values of the pixels also are used to generate the tomographic image.
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