1. An image reproduction apparatus comprising: means for inputting a medical image of a subject's chest obtained by radiographic imaging; means for displaying an imaging menu including exclusively selectable imaging menu items regarding imaging information of the medical image; means for accepting selection of the imaging menu items from the displayed imaging menu; means for carrying out image processing on the medical image to convert the medical image into an image appropriate for reproduction according to the selected imaging menu item; means for reproducing the medical image having been subjected to the image processing; means for calculating an index value representing a thickness of a rib in the medical image; means for determining an age of the imaged subject based on the calculated index value; and means for judging the most appropriate imaging menu item to be selected from the imaging menu items according to the determined age.