1. A method of visualizing a surgical trajectory, the method comprising: receiving 3D imaging information of a region to undergo surgery; combining the received 3D imaging information 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 in the region to undergo surgery; receiving the surgical trajectory for the surgery; determining positions of intersections of the surgical trajectory with the anatomical structures; and providing the positions of the intersections in a coordinate system aligned with the surgical trajectory.