CT findings and the value of Multiplanar Reformation of the Large Vestibular Aqueduct

Objective To study the CT manifestions and explore the value of multiplanar reformation in the diagnosis large vestibular aqueduct. Methods Eighteen patients with large vestibular aqueduct undergone high-resolution axial CT scanning,and obtained MPR images on wokstation. Results Seventeen cases were bilateral sides,one case single side.the formation of the enlarging vestibular aqueduct were mainly presented three types:notch-like(6 ears),triangular(27ears),and saccular(2 ears).All of the patients showed that the medial end directly connected with the vestibule(19 ears),or common crus(16ears).the mean diameter of midportion of the aqueduct was 3.15 mm.Combining with multiple MPR images could show the whole vestibular aqueduct. Conclusion CT can be made accurately diagnosis large vestibular aqueduct,MPR can be better display and diagnose malformation of large vestibular aqueduct.