In a radiation imaging system including a radiation irradiation apparatus that generates radiation and a radiation imaging apparatus that generates image data of a radiation image based on the received radiation, the operation of the radiation irradiation apparatus and the radiation imaging apparatus is misaligned. Appropriate action should be taken before it becomes large enough to affect the diagnosis. A radiation imaging system includes a radiation irradiating apparatus, a first timing means for timing in conjunction with the radiation irradiation apparatus, a radiation imaging apparatus, and a second timing means for timing in synchronization with the radiation imaging apparatus. , Acquisition means for acquiring the time value of the first time measuring means at the predetermined time point and the time value of the second time measuring means at the predetermined time point as the first time information and the second time information, respectively, the acquired first time information and the second time information A determination unit configured to determine whether or not the specific condition is satisfied based on the timing information； and an output unit configured to perform a specific output when the specific condition is determined to be satisfied. [Selection] Figure 5【課題】放射線を発生させる放射線照射装置と、受けた放射線に基づく放射線画像の画像データを生成する放射線撮影装置と、を備えた放射線撮影システムにおいて、放射線照射装置と放射線撮影装置の動作のずれが診断に影響する程大きくなってしまう前に適切な対応をとることができるようにする。【解決手段】放射線撮影システムは、放射線照射装置と、放射線照射装置と連動して計時を行う第一計時手段と、放射線撮影装置と、放射線撮影装置と連動して計時を行う第二計時手段と、所定時点における第一計時手段の計時値及び所定時点における第二計時手段の計時値を、それぞれ第一計時情報及び第二計時情報として取得する取得手段と、取得した第一計時情報及び第二計時情報に基づいて、特定条件が成立したか否かを判断する判断手段と、特定条件が成立したと判断した場合に、特定の出力を行う出力手段と、を備える。【選択図】図５
