1. A method of generating an image of an organ, the method comprising: generating a three-dimensional (3D) model of an organ of a patient based on a first medical image of the organ; generating a plurality of matched images by matching the 3D model of the organ to a plurality of images indicating a change in a shape of the organ based on movement of the organ; and selecting and outputting a matched image from among the plurality of matched images based on a region of a second medical image of the organ.