1. A method for ultrasonography training using image to physical space registration of tomographic volumes from tracked ultrasound, the method comprising: (a) acquiring and storing a plurality of tomographic volumes from tracked ultrasound; (b) providing, for each of the stored tomographic volumes, a respective computer tomography (CT) volume that includes a first location of at least one target, the respective stored tomographic volumes each including a second location of the at least one target; (c) determining, for each of the stored tomographic volumes, a target registration error by calculating a distance between the first and second locations of the at least one target; (d) retrieving, using an image-guided procedure (IGP) system, one of the stored tomographic volumes; (e) using a tracked ultrasound probe coupled to the IGP system on a test patient; and (f) displaying images based on the retrieved volume that correlate to the physical space as determined by the position of the tracked ultrasound probe.