1. A system ( 100 ) for visualizing an object in image data using a first cross-section surface coupled to a model of the object, the system comprising: a model unit ( 110 ) for adapting the model to the object in the image data; a surface unit ( 120 ) for adapting the first cross-section surface to the adapted model based on the coupling between the first cross-section surface and the model; and a visualization unit ( 130 ) for computing an image from the image data based on the adapted first cross-section surface.