Projection data correction method and apparatus, and radiation tomographic imaging method and apparatus

摘要

In order to provide a projection data correction method and apparatus that prevents artifact generation in the direction which provides a low count of penetrating radiation, and a radiation tomographic imaging method employing such a projection data correction method and a radiation tomographic imaging apparatus comprising the projection data correction apparatus, projection data Proj_ij is individually corrected by a weighted addition (604, 606, 608) with an average value (602) containing the proximate data. The weight SGij of the projection data is decreased as the count of the penetrating radiation from which the projection data is derived becomes smaller.