What is the difference between the fuzzy and discrete anatomical models?
It is explained on this page. Throughout this website you may notice discussion on a fuzzy and a discrete version of the anatomical phantom. A fuzzy phantom will specify a mixture of tissue classes for each voxel (eg. a voxel might contain 90% grey matter and 10% white matter). A fuzzy phantom was used to describe the tissue within each voxel during the simulation process. A discrete phantom specifies the tissue type with the largest proportion in each voxel. A discrete phantom was not used in the simulation process. However a user might use this phantom when comparing simulated data against the underlying tissue types (eg. a user might have a classification algorithm which classifies each voxel into one specific tissue type). Which anatomical model to use as “ground truth” for validating an MRI segmentation method? If your method attempts to estimate the partial volume (that is, the tissue fractions in each voxel) then the fuzzy model is probably what you want. Otherwise, the discrete
