PROBLEM TO BE SOLVED: To provide a scattered ray absorption grid in which radiation is emitted from two irradiation directions where an intermediate direction intersects the direction perpendicular to a grid surface, which avoids the reduction of transmissivity and enlargement to equalize the transmissivity in both directions while removing scattered ray including a parallax direction component.SOLUTION: Shield members 51, which are plate-like members, are arranged spaced apart in a projection direction in which the intermediate direction D3 is projected on the grid surface. In addition, the members are arranged so that the ratio of the radiation passing through the space among the radiation emitted from one irradiation direction D1 and the ratio of the radiation passing through the space among the radiation emitted from the other irradiation direction D2 are equalized.COPYRIGHT: (C)2013,JPO&INPIT【課題】中間方向がグリッド表面に垂直な方向と交差する2つの照射方向から放射線が照射される散乱線吸収グリッドにおいて、視差方向成分を含む散乱線を除去しつつ、透過率の低下および大型化を回避して両方向の透過率を同等にする。【解決手段】各遮蔽部材51が、板状部材であって中間方向D3をグリッド表面に投影した投影方向に間隔をあけて配置され、且つ一方の照射方向D1から照射された放射線のうち間隙を透過する放射線の割合と、他方の照射方向D2から照射された放射線のうち間隙を透過する放射線の割合とが同等となるように配置する。【選択図】図4
