PROBLEM TO BE SOLVED: To perform highly accurate correction. An X-ray CT apparatus according to the present embodiment includes an acquisition unit and a correction unit. The acquisition unit acquires a plurality of signals corresponding to a plurality of views including the correction target view, which are obtained by the same detection element. The correction unit corrects the response characteristic of the detector including the detection element for the signal corresponding to the correction target view based on the plurality of signals. [Selection diagram] Figure 1【課題】精度の高い補正を行うことができる。【解決手段】本実施形態に係るＸ線ＣＴ装置は、取得部と、補正部とを含む。取得部は、同一の検出素子で得られる、補正対象ビューを含む複数のビューに対応する複数の信号を取得する。補正部は、前記複数の信号に基づいて、前記補正対象ビューに対応する信号について前記検出素子を含む検出器の応答特性を補正する。【選択図】図１
