Tomograms of the Internal Ear

These tomograms demonstrate the anatomy more clearly than the plain films, and are essential when looking for small lesions such as fractures and congenital anomalies of the middle ear and temporal bone. High-quality tomography often of polycycloidal type together with 1 or 2 mm cuts are needed to show these minute structures. The crista transversalis separates the facial from the acoustic nerve and is an important landmark, as it disappears in intracanalicular acoustic neuromata.