PROBLEM TO BE SOLVED: To provide a radiographic imaging device and a thermal diffusion method capable of solving the problem of temperature unevenness in a radiation detector.SOLUTION: A radiographic imaging device 10 includes a radiation detector 40 in which a plurality of pixels 44 for accumulating electric charge according to irradiated radiation R are arranged two-dimensionally, an FPGA 62, which is a control part 60 for controlling the radiation detector 40, a radiation irradiation part 14 for emitting the radiation R, a C-arm 20 for integrally changing angles of the radiation detector 40 and the FPGA 62 with respect to a vertical direction, which is an example of a predetermined direction, a heat sink 70 provided with a fin 72 for guiding an air flow in a predetermined guiding direction D, which radiates the heat of the FPGA 62, and a storage part 12 for storing the radiation detector 40, the FPGA 62, and the heat sink 70, which includes a radiation detection surface 16 which is irradiated with the radiation R emitted from the radiation irradiation part 14.SELECTED DRAWING: Figure 1【課題】放射線検出器の温度ムラを改善することができる放射線画像撮影装置及び熱拡散方法を提供する。【解決手段】放射線画像撮影装置10は、照射された放射線Rに応じた電荷を蓄積する複数の画素44が二次元状に配置された放射線検出器40と、放射線検出器40を制御する制御部60であるFPGA62と、放射線Rを射出する放射線照射部14と、所定の方向の一例である垂直方向に対す記放射線検出器40及びFPGA62の角度を一体的に変更するCアーム20と、所定の誘導方向Dに気流を誘導するフィン72が設けられ、FPGA62の熱を放熱するヒートシンク70と、放射線検出器40、FPGA62、及びヒートシンク70を収納し、放射線照射部14から射出された放射線Rが照射される放射線検出面16を有する収納部12と、を備える。【選択図】図1
