Patent ID: 8488738

Claim:
A radiographic apparatus having a radiation source for emitting radiation, a radiation source control device for instructing the radiation source to emit the radiation, and a radiation detecting device for detecting the radiation, the radiation detecting device outputting real-time detection data when the radiation source emits the radiation intermittently or continuously, and outputting quiescence detection data when the radiation source emits still radiation, the radiographic apparatus comprising: a storage device for storing a required transit dose indicating what dose of the radiation transmitted through a patient is required for acquisition of the quiescence detection data; a time predicting device for predicting, based on a cycle of variation of a dynamic part which cyclically changes in size in the patient, a point of time when the dynamic part of the patient will be in a predetermined state, as a predicted point of time; an irradiation time estimating device for estimating an irradiation time of the radiation at a time of acquiring the quiescence detection data, as an estimated irradiation time, from the real-time detection data and the required transit dose; an image generating device for generating still images based on the quiescence detection data; and an image superimposing device for superimposing still images picked up at different points of time to create a superimposition image; wherein the quiescence detection data is acquired by the radiation source control device controlling the radiation source to start emitting the radiation at a time earlier than the predicted point of time by a predetermined time calculated based on the estimated irradiation time.