Patent attributes
Provided is a radiation image detection device used in a radiation image photographing system including the radiation image detection device that is portable and acquires radiation image data based on irradiated radiation, and a plurality of control terminals that are connected to the radiation image detection device and acquire the radiation image data acquired by the radiation image detection device, the radiation image detection device includes a hardware processor that: transmits and receives communication information to and from each of the control terminals; determines whether an IP address to be used for data communication by a connected one of the control terminals is a dynamic IP address or a static IP address, based on initial information received from each of the control terminals before data communication is established; and acquires an IP address, in accordance with a determination result.