| 摘要 |
PROBLEM TO BE SOLVED: To provide image reconstruction, minimizing the deterioration of spatial resolution, even when a gap is formed between detector modules in a slice direction of a radiation detector.SOLUTION: A radiation tomographic imaging apparatus comprises a radiation detector 3 in which a plurality of detector modules 30, each containing a plurality of detection elements 31, are arranged in a CH direction and an SL direction, and a gap GAP is formed between the detector modules 30 in the SL direction. In the radiation tomographic imaging apparatus, storage means is provided to store positional information of each individual detection element 31 of the radiation detector 3, and image reconstruction means applies weighted summation on each real data piece Pa1, Pa2 obtained by a plurality of detection elements a1, a2 locating near an intersection point c of a radiation path p passing through a pixel g to be reconstructed from a radiation focal point f and a detection plane k of the radiation detector 3, by weighting coefficients based on positional information Lc of the intersection point c and positional information La1, La2 of the detection elements a1, a2 stored in the storage means to generate projection data P of the radiation path p, and reconstructs the pixel g by using a three-dimensional image reconstruction method on the basis of the projection data P. |
