The invention is provided with: a contour extraction unit (101) for extracting the contour of an organ from an image of the organ included in each of a plurality of ultrasound images acquired from spatially consecutive positions a designation unit (102) for accepting, from a user and for a contour extracted by the contour extraction unit (101), designation information for designating from among the plurality of ultrasound images an image to be manually edited that includes a contour that the user targets for manual editing, as well as edit information indicative of the content of the manual editing and a manual editing unit (103) for editing the contour extracted by the contour extraction unit (101) with respect to the image to be manually edited designated by the designation information accepted by the designation unit (102), on the basis of the edit information. The contour extraction unit (101) additionally extracts a new contour included in a target image different from the image to be manually edited among the plurality of ultrasound images, on the basis of information indicative of a contour included in the image to be manually edited after editing by the manual editing unit (103).La présente invention comporte : une unité dextraction de contour (101) pour extraire le contour dun organe à partir dune image de lorgane comprise dans chacune dune pluralité dimages ultrasonores acquises depuis des positions consécutives dans lespace une unité de désignation (102) pour accepter, provenant dun utilisateur et pour un contour extrait par lunité dextraction de contour (101), des informations de désignation pour désigner parmi la pluralité dimages ultrasonores une image à éditer manuellement qui comprend un contour que lutilisateur cible pour une édition manuelle, ainsi que des informations dédition indicatrices du contenu de lédition manuelle et une unité dédition manuelle (103) pour éditer le contour extrait par lunité dextraction de contour (101) par rapport à lima
