| 摘要 |
PROBLEM TO BE SOLVED: To provide a radiographic apparatus capable of removing scattered radiation and grid foil without preparing the number of patterns corresponding to the misalignment even if misalignment of scattered radiation removal means occurs with respect to radiation detection means.SOLUTION: Foil shadow integrated value images A_SHsum(g, y, a), and I_SHsum(g, y, a) which are normalized to the sums of absorption ratios of direct X rays at individual grid foil pieces between image acquisition without subject interposition and image acquisition with subject interposition are calculated and a distance function D(c) is calculated on the basis of the absorption ratios. If an integrated value image A_SHsum(g, y, a) with the smallest distance function D(c) value is selected from among a plurality of integrated value images A_SHsum(g, y, a), the scattered X rays and grip foil can be removed without preparing the number of patterns corresponding to the misalignment even if misalignment of grids occurs with respect to FPD3. |
