PROBLEM TO BE SOLVED: To provide an advantageous technology for acquiring an energy subtraction image using two radiation imaging panels and one time radiation irradiation in a radiation detection device.SOLUTION: A radiation detection device comprises a housing, a first radiation imaging panel and a second radiation imaging panel that are placed redundantly in the housing, and a radiation absorption part placed between the first radiation imaging panel and the second radiation imaging panel, and the radiation absorption part comprises a first member that contains elements in which K absorption edge energy is more than or equal to 38keV and is less than or equal to 60keV, and a second member that contains elements other than the elements, and the radiation absorption part does not emit visible light to the first radiation imaging panel and the second radiation imaging panel.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2018,JPO&INPIT【課題】 放射線検出装置において、2つの放射線撮像パネルを用い、1回の放射線の照射でエネルギサブトラクション画像を取得するために有利な技術を提供する。【解決手段】 筐体と、筐体の中に重ねて配された第1の放射線撮像パネル及び第2の放射線撮像パネルと、第1の放射線撮像パネルと第2の放射線撮像パネルとの間に配された放射線吸収部と、を含む放射線検出装置であって、放射線吸収部は、K吸収端のエネルギが38keV以上かつ60keV以下に存在する元素を含む第1部材と、前記元素以外の元素を含む第2部材と、を含み、かつ、第1の放射線撮像パネル及び第2の放射線撮像パネルに対して可視光を発しない。【選択図】 図1
