PROBLEM TO BE SOLVED: To provide techniques of generating high-quality reconstructed images at high speed from a plurality of transmission images.SOLUTION: When a transmission image contains first pixels and second pixels which are imaged at different times while continuously changing the positional relationship between a light source, an imaging subject and a detector, a reconstruction processing unit performs a projection or back projection operation between the transmission image and a reconstructed image, and when doing so, selects a pixel on the reconstructed image that corresponds to the first pixels on the basis of the positional relationship between the light source, the imaging subject and the detector at the time when the first pixels were imaged, and selects a pixel on the reconstructed image that corresponds to the second pixels on the basis of the positional relationship between the light source, the imaging subject and the detector at the time when the second pixels were imaged.SELECTED DRAWING: Figure 8【課題】複数の透過像から高品質な再構成画像を高速に生成する技術を提供する。【解決手段】透過像が、光源と対象物と検出器の間の位置関係を連続的に変化させながら異なるタイミングで撮像された第1の画素と第2の画素を含んでいる場合に、再構成処理部は、透過像と再構成画像の間で投影又は逆投影の操作を行うときに、第1の画素に対応する再構成画像上の画素を、第1の画素が撮像されたタイミングにおける光源と対象物と検出器の間の位置関係に基づき選択し、第2の画素に対応する再構成画像上の画素を、第2の画素が撮像されたタイミングにおける光源と対象物と検出器の間の位置関係に基づき選択する。【選択図】図8
