X-ray CT imaging method and X-ray CT scanner

In order to optimize image quality for each specific region in a tomographic image, the present invention generates a plurality of reconstruction of images that have been recovered using various reconstruction functions (step S4), it refers to some specific contained in the tomographic image areas, such , B. organs, either by the trace function or by an automatic segmentation or by a manual correction of the result of automatic segmentation (Step S5), it synthesizes the reconstruction images for each specific area by switching (step S6) and applies them through an image filter switching between filters (step S7) on to each area. The image quality for each region or organ in a tomographic image can be optimized.