A target-viewpoint position in a first-medical-image having multiple viewpoints is determined. Information about an anatomical structure and/or a lesion in the first-medical-image is obtained, as first information. Further, information about an anatomical structure and/or a lesion in a finding with respect to at least one second-medical-image of the same examined person as the first-medical-image, the information being related to the first information, is obtained, as second information, from image-reading-report information including the finding. Each of the at least one second-medical-image has multiple viewpoints, and was obtained at different time from the first-medical-image. The image-reading-report information is correlated with an image of a viewpoint position at which the finding was prepared. An image of a corresponding viewpoint position, which corresponds to the target-viewpoint position, is determined based on the viewpoint position of the image correlated with the image-reading-report information from which the second information has been obtained.