X-ray CT Reconstruction Weight Standardization for Artifact Reduction

The patent applies parameter changes by introducing a normalization step that transforms the weight values. Specifically, the weight for each projection data is divided by the sum of weights for that projection angle, converting absolute weight values into normalized weights that maintain relative importance while ensuring consistency across different projection angles. This parameter transformation resolves the contradiction by preserving noise reduction benefits while eliminating the artifact-causing weight sum differences.

The patent applies segmentation by dividing the weight calculation process into distinct stages: first calculating individual weights for each projection data based on noise characteristics, then separately computing the sum of weights for each projection angle, and finally performing normalization by dividing individual weights by their respective angle sums. This segmented approach improves image quality through comprehensive noise balancing while managing computational complexity by organizing calculations into modular, systematic steps.