Apparatus and Method for determining similarity between lesions in medical image

The lesion degree of similarity determination apparatus and method for medical imaging is provided. Lesion degree of similarity in accordance with an aspect judgment device, pixels included in the first region of the image input unit for receiving an object image, the target lesion area including the reference image and the target lesion area including the reference lesion area of ​​the reference lesion area by applying a penalty weight to pixels, it increases away from the reference lesion area included the Advantage weight that increases the closer to the center, a second region of the target lesion area, each degree of similarity to determine the degree of similarity based on the lesion area, and the target lesion area determination may include a.