抄録
In recent years, the multislice CT system has come into practical use that enables table movement of half mm, resulting in a significant improvement in resolution. The use of this CT system enables to depict the entire auditory ossicles, including the stapes. 3D reconstruction was performed using helical CT data in 5 patients with chronic otitis media and 5 patients with cholesteatoma.
An Aquilion Multi (Toshiba) multislice helical CT scanner and a Xtension (Toshiba) image workstation were used in this study. We demonstrated the 3D display with axial, coronal and sagittal images. Compared with the normal ears, it was necessary to set a higher threshold for the affected ears. It is important to select suitable threshold for demonstration of 3 D images optimally. Bone destruction of the stapes was confirmed at surgery in 2 ears. The stapes was observed at 3 D-CT imaging in other 18 ears. It was found that the 3 D images of the ossicular destruction in ears with cholesteatoma were consistent with surgical findings. It is therefore concluded that 3 D imaging of the middle ear using a multislice CT scanner is clinically useful.
