A medical image system (100)for enables a user to navigate through three-dimensional 3D image data showing an anatomical structure by simultaneously displaying a set of views of the 3D image data showing the anatomical structure. The system includes a data input (140) for receiving orientation data (142), a user input (120) for receiving a navigation command (122)from the user, a plane processor (160) for, in dependence on the navigation command, adjusting a spatial configuration of a set of planes (102) for obtaining a further set of planes (162) intersecting the 3D image data, and a view processor (180) for, in dependence on the further set of planes and the orientation data, establishing a further set of views (182) of the 3D image data for displaying the further set of views as an update of the set of views.