Fig. 1.

A visualization of the steps of the method for five different lesions. Each column corresponds to a different part of the method, and each row corresponds to a different lesion of interest. In columns 5 and 6, the different colors represent different lesions, where the colors are arbitrarily assigned. In the last column, lesions classified as PRLs are visualized as green, and lesions classified as not PRLs are visualized as red. Subfigure A shows a lesion that was both manually identified as a PRL and classified as a PRL, i.e. a true positive. Subfigure B shows a lesion that was manually identified as not a PRL but classified as a PRL, i.e. a false positive. Correspondingly, subfigure C shows a false negative lesion, and subfigure D shows a true negative lesion. Subfigure E shows a lesion that was automatically labelled as a single lesion but is actually a confluence of lesions.