1. A method for determining inhomogeneity in a portion of animal tissue, said method providing for the arrangement beforehand of a 3-dimensional density map of said portion of animal tissue, said map being obtained by means of computed tomography and therefore being formed by a plurality of voxels, wherein, for each voxel of said map, considered in turn as the central voxel, the following steps are carried out: identifying a space surrounding said central voxel and containing a group of peripheral voxels, for each peripheral voxel of said group, calculating a value proportional to the ratio or the difference between the density of said peripheral voxel and the density of said central voxel, thus obtaining a plurality of values, calculating the maximum value and/or the minimum value and/or the average value and/or a statistical partitioning value of said values, thus obtaining a local indicator of inhomogeneity of said portion of animal tissue in correspondence to said central voxel.