In a method and system for retrieving a medical image from a data base, an image processing algorithm is applied to a first medical image. The result of the applied image processing algorithm to the first medical image is compared with a plurality of results being stored in a data base. Each result of the plurality of results is the result of the image-processing algorithm being applied to each medical image of a plurality of medical images which is stored in the data base. Then, a second medical image belonging to the plurality of medical images is determined and retrieved from the data base, wherein the relevant result is comparable to the relevant result related to the first medical image.