PROBLEM TO BE SOLVED: To provide a radiation detection device in which the image noise due to the external AC magnetic field is reduced.SOLUTION: A radiation detection device includes: a planar radiation detection panel in which a plurality of detectors for detecting the radiation are disposed in two-dimensional array with driving signal lines and image signal lines； an output circuit that drives the driving signal lines to drive the detectors； a readout circuit that reads out signals from the driven detectors through the image signal lines； a conductive layer disposed close to the radiation detection panel； a first connection member connecting between the conductive layer and the ground of the readout circuit； and a second connection member connecting between the conductive layer and a wire that supplies the driving-off bias to the driving signal line. The first connection member, the second connection member, the driving signal line, the image signal line, and the conductive layer form a closed circuit where the induction current from the AC magnetic field flows. The first connection member is connected to an approximate center of a side where the readout circuit of the radiation detection panel is connected.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2017,JPO&INPIT【課題】放射線検出装置において、外来の交流磁界に起因する画像ノイズを低減する。【解決手段】放射線検出装置は、放射線を検出するための複数の検出部が駆動信号線と画像信号線により二次元のアレイ状に配置された平面状の放射線検出パネルと、検出部を駆動させるために駆動信号線を駆動する出力回路と、駆動された検出部から画像信号線を介して信号を読み出す読み出し回路と、放射線検出パネルに近接して配置された導電層と、読み出し回路のグランドと導電層とを接続する第一の接続部材と、駆動信号線に駆動オフバイアスを提供する配線と導電層とを接続する第二の接続部材と、を有し、第一の接続部材、第二の接続部材、駆動信号線、画像信号線、導電層により、交流磁界に起因した誘導電流が流れる閉回路が形成され、第一の接続部材は、放射線検出パネルの読み出し回路が接続される辺の略中央に接続されている。【選択図】 図１
