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  • Title: [High-resolution CT of otosclerosis].
    Author: Yang D, Kodama T, Tono T, Ochiai R, Kiyomizu K, Suzuki Y, Yano T, Watanabe K.
    Journal: Nihon Igaku Hoshasen Gakkai Zasshi; 1997 Nov; 57(13):864-70. PubMed ID: 9423315.
    Abstract:
    High-resolution CT (HRCT) scans of thirty-two patients (60 ears) with the clinical diagnosis of fenestral otosclerosis were evaluated retrospectively. HRCT was performed with 1-mm-thick targeted sections and 1-mm (36 ears) or 0.5-mm (10 ears) intervals in the semiaxial projection. Seven patients (14 ears) underwent helical scanning with a 1-mm slice thickness and 1-mm/sec table speed. Forty-five ears (75%) were found to have one or more otospongiotic or otosclerotic foci on HRCT. In most instances (30 ears), the otospongiotic foci were found in the region of the fissula ante fenestram. No significant correlations between CT findings and air conduction threshold were observed. We found a significant relationship between lesions of the labrinthine capsule and sensorineural hearing loss. We conclude that HRCT is a valuable modality for diagnosing otosclerosis, especially when otospongiotic focus is detected.
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