Computed tomography (CT) images of the temporal bone: the dimensions of anatomical structures of the inner ear in normal health and with Meniere’s disease

Abstract


The aim of this study was to determine the dimensions of anatomical structures of the inner ear on computed tomography (CT) images in normal subjects and to define the type of its changes in patients with Meniere’s disease (MD). CT images of the temporal bone of 29 patients without ear pathology and 30 patients with MD have been evaluated. The dimensions of the different structures of the inner ear were measured, using multiplanar reformations and three-dimensional reconstructions. In patients with MD, the length and the width of the vestibular aqueduct and the width of its external aperture were smaller, the size of the bony island of the lateral semicircular canal was smaller, and the diameter of lateral semicircular canal was bigger, compared with the values from the control group. We also found out that in patients with MD the distances between the bony labyrinth and the posterior petrous surface and between the posterior semicircular canal and the jugular fossa were smaller, than in normal subjects. In patients with MD, we found no significant differences in the majority of the values between affected and nonaffected ears. Our study confirms the hypothesis that congenital and developmental factors, such as hypoplastic vestibular aqueduct, dysplastic lateral semicircular canal and hypoplastic posterior part of the petrous bone, might play a role in pathogenesis of MD.

Full Text

Компьютерная томография височной кости: оазмеры анатомических структур внутреннего уха в норме и при болезни Меньера

About the authors

P A Popov


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