Computed tomography (CT) is a medical imaging method using X-ray tomography created by computer processing. It provides important diagnostic information in various anatomical planes. The main advantage over MRI scanning is that it demonstrates bone as well as soft tissue features. A temporal bone CT scan will therefore show details of external ear canal, middle ear and ossicles, mastoid and inner ear problems. The bone density can be measured directly which is important in the diagnosis of bone thinning conditions such as otospongiosis or osteomalacia.
The scanning techniques involves lying still with the head in a medical “hair-dryer” capsule for approximately 20 minutes. It is a completely painless procedure.