
FIG 2. Axial high-resolution T2-weighted FSE MR image of a normal right inner ear at the midmodiolar level shows the normal cochlea and vestibule. The fluid-filled chambers of the cochlea are hyperintense and display the characteristic cochlear outline. The modiolus (white arrow with black outline) appears as a hypointense soft-tissue plug at the base of the cochlear spiral. Single straight white arrow indicates interscalar septum. The membranous vestibule (V) is ovoid in shape. The lateral (solid white arrowhead) and posterior (open white arrowhead) semicircular canals are visible. Double arrows indicate small segment of the normal endolymphatic duct; cochlear nerve (solid black arrowhead) and inferior vestibular nerve (open black arrowhead) are branches of the eighth cranial nerve; the tympanic segment of the seventh cranial nerve (curved arrow) is faintly seen; and the anterior inferior cerebellar artery (black arrow) is seen in its typical location near the porus acusticus.(Reprinted from [22] with permission.)