1. A system configured to process medical images, the system being configured to obtain 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 configured to establish 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, wherein the first medical image and the second medical image are three-dimensional [3D] medical images, the displacement vectors are 3D displacement vectors; a deformation estimator configured to, in dependence on the displacement vectors, establish 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 configured to generate visualization data configured to, when being displayed on a display, establish a multi-dimensional graph comprising magnitudes of the displacement vectors as first variables and the deformation values as second variables, wherein the multi-dimensional graph is a two-dimensional [2D] graph and the visualization generator is configured to generate further visualization data configured to, when being displayed on the display, establish a further 2D graph comprising inclination angles of the displacement vectors as first variables and azimuth angles of the displacement vectors as second variables.