Computer-implemented methods are used to analyze a medical image to assess the state of the sample region. In at least one embodiment, the method comprises receiving at least one medical image collected previously from an image source, the at least one medical image comprising a plurality of voxels, each characterized by a signal value; classifying the signal value of each voxel as representing one of healthy tissue or diseased tissue based on a threshold value; and analyzing at least one topographical feature of the at least one medical image.