1. A system for processing medical images, the system being arranged for obtaining a first medical image and a second medical image, the first medical image and the second medical image being rigidly registered medical images of an anatomical structure, and the system comprising: a displacement estimator for establishing displacement vectors for at least a first portion of the first medical image, wherein the first portion has a first dimensionality that corresponds to a second dimensionality of the first medical image, the displacement vectors matching the first portion of the first medical image to a second portion of the second medical image; a deformation estimator for, in dependence on the displacement vectors, establishing deformation values for the first portion, the deformation values representing a deformation of the first portion with respect to the second portion; and a visualization generator for generating visualization data for, when being displayed on a display, establishing a multi-dimensional graph comprising magnitudes of the displacement vectors as first variables and the deformation values as second variables.