High-resolution computerized tomography of the petrous bone

Abstract
High-resolution computerized tomography (CT) was used to investigate abnormalities of the ear and petrous bone. Congenital, traumatic, infective and neoplastic lesions were evaluated in 30 patients with proven pathology. Some bone changes including abnormalities of the auditory ossicles were better demonstrated than by conventional tomographic techniques, and high-resolution CT has some advantages in demonstrating soft tissue abnormality and bone changes in the middle ear in primary neoplastic disease and secondary cholesteatoma. The absence of any practical means of taking sagittal sections with the present scanner design limits the usefulness of high resolution CT of the petrous bone, but this technique may now take its place as an important complementary procedure to pluridirectional tomography.

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