PROBLEM TO BE SOLVED: To shorten a time for scattered ray estimation processing by reducing an arithmetic load required for the processing.SOLUTION: An image processing device which processes a radiation image output from a radiation detection unit including plural pixels comprises: a region determination unit which determines a direct radiation region where radiation reaches the radiation detection unit directly from a radiation generation unit, on the basis of the radiation image； and a scattered ray estimation unit which estimates scattered rays included in the radiation image, by correcting the pixel value of the region determined as the direct radiation region.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2020,JPO&INPIT【課題】散乱線推定処理に要する演算負荷を低減し、処理時間の短縮化を図ること。【解決手段】 複数の画素を含む放射線検出部から出力される放射線画像を処理する画像処理装置は、放射線発生部から放射線検出部に放射線が直接到達する直接線領域を放射線画像に基づいて判定する領域判定部と、直接線領域と判定された領域の画素値を修正し、放射線画像に含まれる散乱線を推定する散乱線推定部と、を備える。【選択図】図２
