PROBLEM TO BE SOLVED: To provide technology which suppresses potential variation which occurs in a signal line due to switching of a control signal to a switch element of a radiation detection pixel and which is advantageous to precisely read irradiation of radiation.SOLUTION: A radiation imaging device 200 includes: an imaging pixel 1 for acquiring a radiation image a detection pixel 2 which has a detection switch element 7 for outputting a signal from a detection conversion element 6 and detects irradiation of radiation. The device also comprises: a control line 9 which is electrically connected to a control electrode 201 of the detection switch element 7 and a driving section 52 which is electrically connected to the control line 9. The driving section 52 gradually changes voltage between off voltage which makes the detection switch element 7 be in a non-conduction state and on voltage which makes the element be in a conduction state.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2016,JPO&INPIT【課題】 放射線検知画素のスイッチ素子への制御信号の切り替えに起因して信号線に発生する電位変動を抑制し、放射線の照射を精度よく読み出すために有利な技術を提供すること。【解決手段】 放射線画像の取得のための撮像画素1と、検知用変換素子6からの信号を出力するための検知用スイッチ素子7を有し、放射線の入射を検知する検知画素2と、を含む放射線撮像装置200であって、検知用スイッチ素子7の制御電極201に電気的に接続された制御線9と、制御線9に電気的に接続された駆動部52と、を有し、駆動部52は、検知用スイッチ素子7を非導通状態にするオフ電圧と導通状態にするオン電圧との間で電圧を段階的に変化させることを特徴とする。【選択図】 図1
