1. A method for detecting a candidate nodule from anatomical images comprising the steps of: selecting a seed voxel from a volume created from the anatomical images; growing a region from the seed voxel, said region defined by a volume made up of voxels contiguous to the seed voxel and satisfying growth criteria; creating a first array having first array values that relate each voxel of the region to a first voxel distance; creating a second array having second array values that relate each voxel of the region to a second voxel distance; and processing a ratio of a first array value to a corresponding second array value to determine a candidate nodule location.