High Resolution Computed Tomography in Stapedial Otosclerosis

• Published in: Indian journal of otolaryngology, and head, and neck surgery and head, and neck surgery, 2013-12, Vol.65 (Suppl 3), p.505-511
• Main Authors: Priya, S. R., Singh, P. P., Upreti, Lalendra, Vaid, Lakshmi
• Format: Article
• Language: English
• Subjects: Ear diseases; Head and Neck Surgery; Medicine; Medicine & Public Health; Original; Original Article; Otology; Otorhinolaryngology; Tomography
• ISSN: 2231-3796; 0973-7707
• DOI: 10.1007/s12070-011-0412-6

The value of high-resolution CT scanning in diagnosing stapedial otosclerosis and in influencing surgical planning was studied. 40 cases, consisting of patients of both genders, above the age of 14 years, with a clinical diagnosis of otosclerosis underwent HRCT of the temporal bones. Images were acquired in axial plane, with a bone algorithm, keeping slice thickness at 0.5 mm and intervals of 0.5 mm. Reconstruction of the volume data set was done to obtain overlapping slices in various planes, so as to obtain the best possible images of the footplate of stapes. The thickness of the footplate was measured and the site of lesion was noted in these images. On exploratory tympanotomy, the footplate was assessed and graded according to a visual scale. HRCT was able to diagnose stapedial otosclerosis in 85% ears. It was able to identify the presence of a thickened footplate correctly with a sensitivity of 85.3% ( P value 0.16). It was able to correctly localize the site of otosclerotic focus in 85% cases ( P value