Communication is performed in an optimal operating environment.A communication section (80, 81) having a relatively high communication speed is used for communicating a detection signal or an emission stop signal between a source control device (11) and an electronic cassette (13). The detection signal is outputted from a detection pixel (65) of the electronic cassette (13). The emission stop signal depends on a comparison result between an integrated value of the detection signal and an emission stop threshold value. On the other hand, a wireless communication section (37) having a lower communication speed than that of the detection signal and the emission stop signal is used for communicating image data and the like between the electronic cassette (13) and a console (14).
