DISPOSITIF DE TRAITEMENT D'IMAGE, SYSTÈME D'ACQUISITION D'IMAGE RADIOGRAPHIQUE, D'IMAGES, PROCÉDÉ DE TRAITEMENT D'IMAGE ET PROGRAMME DE TRAITEMENT D'IMAGE
Provided are an image processing device, a radiation imaging system, an image processing method, and an image processing program which are capable of improving the image quality of a synthetic mammogram image. A control unit 40 sets an angle of incidence of radiation, incident on a detection surface 27 of a radiation detector 26 with respect to the detection surface 27, to a plurality of angles different from each other including an angle (0 degrees) in a normal direction to the detection surface 27, and acquires at least one of a plurality of projection images captured by the radiation detector 26 in accordance with the angle of incidence or reconstructed images reconstructed using the projection images. In addition, the control unit 40 generates a first synthetic mammogram image Ms1 on the basis of the one image. In addition, the control unit 40 generates a second synthetic mammogram image Ms2 which is standard by synthesizing a high-frequency image Msmh having a high-frequency component higher than a predetermined frequency of the first synthetic mammogram image Ms1 and a low-frequency image Tpl having a low-frequency component of equal to or lower than a predetermined frequency of a zero-degree projection image Tp0.
