PROBLEM TO BE SOLVED: To provide an x-ray filter, a radiation detection apparatus, and a radiographic examination apparatus which are capable of improving the accuracy of substance discrimination.SOLUTION: In an x-ray filter according to an embodiment, a set of filters including at least a laminate of first layers with first K absorption ends and second layers with second K absorption ends along a second direction intersecting a first direction intersecting the detection face of a detector are periodically arranged along the second direction.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2017,JPO&INPIT【課題】物質弁別の精度を向上させることができるX線フィルタ、放射線検出装置及び放射線検査装置を提供する。【解決手段】実施形態のX線フィルタは、検出器の検出面に対して交わる第1の方向と交わる第2の方向に沿って、第1のK吸収端を有する第1の層と、第2のK吸収端を有する第2の層とが積層された積層体を少なくとも含む1組のフィルタを第2の方向に沿って周期的に配置する。【選択図】図1
