PROBLEM TO BE SOLVED: To provide a technology capable of improving detection quantum efficiency of a radiation detection assembly.SOLUTION: In a radiation detection assembly including a sensor panel having a pixel array containing a plurality of photoelectric conversion elements, and a scintillator layer in which a plurality of columnar crystals for converting a radiation into light are arranged so as to cover the whole area of the pixel array, each of the plurality of columnar crystals is tilted in the same direction from a normal line of the sensor panel, and each of the plurality of columnar crystals is thickened gradually toward the sensor panel excluding the end part of each columnar crystal.SELECTED DRAWING: Figure 3COPYRIGHT: (C)2016,JPO&INPIT【課題】放射線検出装置の検出量子効率を向上する技術を提供する。【解決手段】放射線検出装置は、複数の光電変換素子を含む画素アレイを有するセンサパネルと、放射線を光に変換する複数の柱状結晶が画素アレイの全域を覆うように配されたシンチレータ層とを備え、複数の柱状結晶のそれぞれは、センサパネルの法線から同一の方向に傾斜しており、複数の柱状結晶のそれぞれは、各柱状結晶の端部を除いて、センサパネルに近づくにつれて太くなる。【選択図】図3
