This teaching data creation system (10) comprises an image acquisition unit (110), an image association unit (120), an image output unit (130), an input reception unit (140), and a teaching information imparting unit (150). The image acquisition unit acquires a plurality of medical images. The image association unit associates, with each other, medical images included in the plurality of medical images on the basis of the similarity between objects to be imaged, and creates an association image group configured by grouping medical images that have been able to be associated. The image input unit outputs, on a display unit (300), an image to be imparted to which representative teaching information is to be imparted on the basis of the association image group. The input receiving unit receives an input of the representative teaching information. The teaching information imparting unit imparts teaching information to the medical images included in the association image group on the basis of the representative teaching information to be input to the images to be imparted.
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