PROBLEM TO BE SOLVED: To accurately determine not only whether or not a radiation of an intended dose reaches a radiation detector when a radiation image is taken, but also whether or not the obtained radiation image has an intended image quality. To be able to judge. An image processing device (3) includes an acquisition means for acquiring image data of a radiation image, a calculation means for calculating an exposure index related to noise of a radiation image based on the image data acquired by the acquisition means, and calculation. A notification means for performing notification based on an exposure index calculated by the means is provided. The calculation means calculates a deviation index indicating the degree of deviation of the exposure index with respect to the target value of the exposure index based on the calculated exposure index and the target value of the exposure index, and the notification means is the deviation index calculated by the calculation means. Can also be notified. [Selection diagram] Fig. 4【課題】放射線画像を撮影したときに、意図した線量の放射線が放射線検出器に到達したか否かだけではなく、得られた放射線画像が意図した画質になっているか否かについてもユーザーが正確に判断できるようにする。【解決手段】画像処理装置３は、放射線画像の画像データを取得する取得手段と、取得手段が取得した画像データに基づいて、放射線画像のノイズに関連する露光指標を算出する算出手段と、算出手段が算出した露光指標に基づく報知を行う報知手段と、を備える。算出手段は、算出した露光指標及び露光指標の目標値に基づいて、露光指標の目標値に対する露光指標のずれの程度を表す偏差指標を算出し、報知手段は、算出手段が算出した前記偏差指標を報知することもできる。【選択図】図４
