Clinical Information:

Technique:

Fine slice non-contrast helical CT images were obtained through the skull base. Bone and soft tissue windows were reconstructed.

Comparison:

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Findings:

Right Side:

• No focal bony abnormality is identified in the skull base.
• The external auditory canal, middle ear, vestibular-cochlear apparatus and internal acoustic canal have a normal appearance. The vestibular aqueduct is normal size.
• The tympanic membrane and ossicles are normal. The epitympanic recess, scutum, mastoid antrum and mastoid air cells are normal. 
• The course of the facial nerve is normal.
• The carotid canal and jugular foramen are unremarkable.

Left Side:

• No focal bony abnormality is identified in the skull base.
• The external auditory canal, middle ear, vestibular-cochlear apparatus and internal acoustic canal have a normal appearance. The vestibular aqueduct is normal size.
• The tympanic membrane and ossicles are normal. The epitympanic recess, scutum, mastoid antrum and mastoid air cells are normal. 
• The course of the facial nerve is normal.
• The carotid canal and jugular foramen are unremarkable.

Other:

• The nasopharynx is normal. The fossae of Rosenmuller and the eustashian tubes are normal.
• The visualised intracranial structures are normal, as is the craniocervical junction.
• The proximal neck structures have a normal appearance. The parotid glands are normal within the field of view.

Conclusion:

Normal CT petrous temporal bones.