TECHNIQUE: High-resolution 0.75 mm sections through the temporal bones were obtained in the axial plane and were reformatted in the coronal plane. Images were viewed on soft tissue and bone windows. COMPARISON: None FINDINGS: On the right side, the external auditory canal is patent. The tympanic membrane is mildly thickened. The middle ear cavity is opacified with opacification within the epitympanum and Prusak's space.