Patent ID: 7528376

Claim:
A radiographic apparatus comprising: a photo timer comprising: a radiation dose detector for detecting the dose of radiation irradiated from an external irradiation apparatus; a stop-signal output means for outputting a stop signal for stopping irradiation from the irradiation apparatus when the radiation dose detector detects a radiation dose which is larger than or equal to a predetermined value; and a stop-signal communication means for sending the stop signal, which is output from the stop-signal output means, to the irradiation apparatus by wireless means; a solid state detector for recording image information by being irradiated with radiation which carries the image information and outputting an image signal representing the recorded image information; and an image-signal communication means for sending the image signal, output from the solid state detector, to an external apparatus by wireless means; wherein the stop-signal communication means and the image-signal communication means are configured so that communication from the stop-signal communication means and communication from the image-signal communication means do not interfere with each other; wherein the stop-signal communication means and the image-signal communication means are separate and independent from each other; wherein the radiographic apparatus comprises a detection unit that continuously detects failure in wireless communication with the external irradiation apparatus prior to starting irradiation of the subject by the irradiation apparatus; and wherein, when an abnormality is detected by the detection unit of radiographic apparatus, operations are ceased.