A system (20) for interacting with a three-dimensional object dataset comprises a signal input (21) for receiving a signal from an interaction device (34) comprising a touch sensitive surface (35) having a typical shape of at least part of an object represented by the three-dimensional object dataset, wherein the signal is indicative of a location on the touch sensitive surface (35) that is touched. The system further comprises a mapping unit (22) for mapping the touched location to a corresponding point of the object represented by the three-dimensional object dataset. The three-dimensional object dataset is based on a signal obtained from a scanner (24) arranged for scanning the object.