Fig. 4From: Comparison of vestibular aqueduct visualization on computed tomography and magnetic resonance imaging in patients with Ménière’s diseaseDifferent types of peri-aqueductal pneumatization. a Large-cell pneumatization (arrow) in the vicinity of the aqueduct. b Small-cell pneumatization (arrow) in the vicinity of the aqueduct. c Absence of air cellBack to article page