Diagnostic application of CT multiplanar reformation in large vestibular aqueduct syndrome

Objective This study assessed the value of CT multiplanar reformation in the patients with large vestibular aqueduct syndrome. Methods Thirty-one cases underwent CT scanning of the temporal bones. The axial multiplanar reformation(MPR) image and the special MPR image in which the full long leg of the vestibular aqueduct was shown in the same image were obtained. The original axial CT scanning images were compared with the MPR images. Results Vestibular aqueducts of both sides were shown symmetrically in the original axial CT images in 3 cases (9.68 %), while the MPR images showed the vestibular aqueduct symmetrically on both sides in all cases. The full long leg of the vestibular aqueduct on both sides was detected in the same axial image in 24 cases whereas measurement could not be taken in the axial image in which full long legs were not shown in the remaining 7 cases. The full long leg was shown in the same MPR image in 30 cases. Conclusion The MPR image can show vestibular aqueduct symmetrically and the full long leg in the same image. It is useful in the evaluation of large vestibular aqueduct syndrome.