PROBLEM TO BE SOLVED: To make a radiation image detector with a built-in AEC function usable without consuming extra cost and labor in a radiographic system having an X-ray source control device in which the start and end synchronization signals and AEC signals cannot be communicated over a single communication path.SOLUTION: A synchronous communication interface 39 of an electronic cassette 13 is connected with a synchronous communication interface 33 of an X-ray source control device 11 via a signal cable 40. A first communication path 41 is established by the synchronous communication interfaces 33 and 39, and the signal cable 40. An irradiation start request signal S1, an irradiation permission signal S2, and an irradiation end signal S3 are communicated over the first communication path 41. An AEC interface 42 of the electronic cassette 13 is connected with an AEC interface 29 of the X-ray source control device 11 via a signal cable 43. A second communication path 44 is established by the AEC interfaces 29 and 42, and the signal cable 43. A second dose detection signal S4 is communicated over the second communication path 44.COPYRIGHT: (C)2014,JPO&INPIT【課題】1本の通信路で開始、終了同期信号とAEC信号を通信することができない線源制御装置をもつ放射線撮影システムで、余計な費用と手間を掛けることなくAEC機能内蔵の放射線画像検出装置を使用可能とする。【解決手段】電子カセッテ13の同期通信用I/F39は線源制御装置11の同期通信用I/F33と信号ケーブル40を介して接続されている。同期通信用I/F33、39、信号ケーブル40により第1通信路41が確立される。第1通信路41で照射開始要求信号S1、照射許可信号S2、照射終了信号S3の通信を行う。電子カセッテ13のAEC用I/F42は線源制御装置11のAEC用I/F29と信号ケーブル43を介して接続されている。AEC用I/F29、AEC用I/F42、信号ケーブル43により第2通信路44が確立される。第2通信路44で第2線量検出信号S4の通信を行う。【選択図】図3
