Imaging

Superior Semicircular Canal Dehiscence

Preliminary Diagnosis: Superior semicircular canal dehiscence

I. What imaging technique is first-line for this diagnosis

  • CT temporal bone without contrast.

II. Describe the advantages and disadvantages of this technique for diagnosis of superior semicircular canal dehiscence.

Advantages

  • Relatively inexpensive and fast imaging modality that offers exquisite detail of the osseous structures of the inner, middle, and external ear.

Disadvantages

  • Exposes patients to ionizing radiation.

III. What are the contraindications for the first-line imaging technique?

  • May be contraindicated in pregnant patients.

IV. What alternative imaging techniques are available?

  • No specific alternative imaging techniques exist.

V. Describe the advantages and disadvantages of the alternative techniques for diagnosis of superior semicircular canal dehiscence.

  • Not applicable.

VI. What are the contraindications for the alternative imaging techniques?

  • Not applicable.

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