PROBLEM TO BE SOLVED: To provide a radiation image detector for reducing the measurement frequency of an offset charge amount and facilitating radiography without enlarging a device or raising a price.SOLUTION: On a substrate, a plurality of pixels including a switching element, a photoelectric conversion element and an element with electric capacity as one set of elements are two-dimensionally arrayed. The radiation image detector includes, on the pixels, a radiation sensor 11 for which a fluorescence conversion film for converting X-rays made incident from the outside to light is laminated, and a gate driving circuit 13 for applying a drive voltage to one arbitrarily selected row selection line and applying a voltage in the direction opposite to the drive voltage to an adjacent row selection line.COPYRIGHT: (C)2012,JPO&INPIT【課題】装置を大型化、高価格化することなく、オフセット電荷量の計測頻度を削減し、X線撮影を容易にする放射線画像検出器を提供する。【解決手段】基板上に、スイッチング素子、光電変換素子、及び電気的容量を有する素子を1組の要素として含む画素が二次元状に複数個配列され、画素上に、外部から入射したX線を光に変換する蛍光変換膜が積層された放射線センサ11と、任意に選択した1本の行選択線に駆動電圧を印加するとともに、隣接行選択線に駆動電圧とは逆方向の電圧を印加するゲート駆動回路13と、を備える。【選択図】図1
