Fig 4.

Noncontrast CBCT scan of a 50-year-old acquired with a temporal bone protocol (40 seconds, 600 frames, 0.3-mm-pixels, 125 kVp, 50.85 mA). A, Coronal image of the normal right temporal bone demonstrates the vestibulocochlear nerve, body and long limb of the incus, as well as the stapedial neck and crura in the fossa of the oval window. B, Axial section at the level of the right mesotympanum demonstrates the head of the malleus, short limb of the incus, and stapedial crura, as well as the cochlear nerve, tensor tympani, and mastoid part of the facial nerve VII. C, Coronal section through the left cochlea demonstrates the modiolus, tympanic part of facial nerve VII, tensor tympani, and malleus. D, Axial section through the right mesotympanum at the level of the round window demonstrates the handle of the malleus, base of cochlea, and mastoid portion of the facial nerve VII.