Objective: To evaluate the value of HRCT with multi-planar reformation (MPR) in the diagnosis of otosclerosis.
Methods: 138 ears in 129 patients with otosclerosis confirmed by surgery were evaluated retrospectively, using the MPR image along stapes as standard image, and 132 normal ears were collected as the control group.
Results: In the otosclerosis group, HRCT-MPR was positive in 108 ears, suspicious positive in 12 ears, and negative in 18 ears.In the control group, HRCT-MPR was positive in 4 ears, suspicious positive in 9 ears, and negative in 119 ears. The sensitivity for HRCT-MPR was 87.0% and the specificity was 90.2%. However, with 2 mm axial CT alone, the sensitivity was only 47.8%.The positive findings were mainly fenestral foci which related to stapes.
Conclusions: HRCT-MPR showed high rate of sensitivity and specificity.We recommend the MPR image along stapes as standard image for otosclerosis diagnosis.