| 摘要 |
In an X-ray CT image reconstruction method, position and size of a high X-ray absorber are determined by photographing a to-be-measured-target using high-energy X-rays, and performing the image reconstruction. Moreover, photographed data is computed which corresponds to a case where the high X-ray absorber is photographed using low-energy X-rays. Next, the to-be-measured-target is photographed using the low-energy X-rays. Furthermore, positions and sizes of low X-ray absorbers are determined by subtracting influence of the high X-ray absorber computed above from projection data which results from the photography using the low-energy X-rays. Finally, the positions and sizes of the high and low X-ray absorbers are synthesized on the reconstructed image.
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