PROBLEM TO BE SOLVED: To provide a hybrid type X-ray detector capable of high-quality imaging and an X-ray CT apparatus provided with such an X-ray detector.SOLUTION: The X-ray detector includes two or more columns of detection signals and reference channels for respective columns. The detection channels comprise two or more groups of detection channels (510a, 520a) for which the product of the number of columns and the pitch of the columns is equal and the combination of the number of columns and the pitch of the columns is different. The reference channels comprise two or more groups of reference channels (510b, 520b) for which the combination of the number of columns and the pitch of the columns matches with the combination of the number of columns and the pitch of the columns respectively in the two or more groups of detection channels.COPYRIGHT: (C)2009,JPO&INPIT【課題】高品質の撮影が可能なハイブリッド型のX線検出器、および、そのようなX線検出器を備えたX線CT装置を実現する。【解決手段】複数列の検出チャンネルと列ごとの参照チャンネルを有するX線検出器であって、前記検出チャンネルは、列数と列のピッチの積が等しくかつ列数と列のピッチの組み合わせが異なる複数群の検出チャンネル(510a,520a)からなり、前記参照チャンネルは、列数と列のピッチの組み合わせが、前記複数群の検出チャンネルにおける列数と列のピッチの組み合わせにそれぞれ一致する複数群の参照チャンネル(510b,520b)からなる。【選択図】図5
