1. A method of visualizing a surgical trajectory ( 32 , 101 , 42 , 46 , 47 ), the method comprising, receiving ( 71 ) 3D imaging information ( 31 ) of a region to undergo surgery, combining ( 72 ) the received 3D imaging information ( 31 ) with data from an anatomic model repository to obtain a combined map of the region to undergo surgery, the combined map comprising expected positions of anatomical structures ( 102 , 103 , 104 ) in the region to undergo surgery, receiving ( 73 ) the surgical trajectory ( 32 , 101 , 42 , 46 , 47 ) for the surgery, determining ( 74 ) positions of intersections ( 43 , 44 ) of the surgical trajectory ( 32 , 101 , 42 , 46 , 47 ) with the anatomical structures ( 102 , 103 , 104 ), and providing ( 75 ) the positions of the intersections ( 43 , 44 ) in a coordinate system aligned with the surgical trajectory ( 32 , 101 , 42 , 46 , 47 ).