耳管垂直断ＣＴによる耳管及び耳管周囲組織の解析

DOI 被引用文献3件 参考文献18件

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  • Analyses of the eustachian tube and its surrounding tissues with cross sectional images by high-resolution computed tomography (HR-CT).

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We attempted to image the eustachian tube (ET) and its surrounding tissues by high-resolution computed tomography (HR-CT).Twenty-two normal subjects (44 ears) without middle ear problems were studied, and a patient with severe patulous ET was also studied as an abnormal case. In our device of multiplanar reconstruction technique, we were able to obtain the clear reconstructed images of the ET lumen as well as of its surrounding tissues (bone, ET cartilage, tensor veli palatini muscle, levator veli palatini muscle, Ostmann's fat tissue, tensor tympani muscle, internal carotid artery) at any desired portion, either parallel or perpendicular to the long axis of the ET. However, the exact borders between the ET cartilage and the muscles, Ostmann's fat tissue and the tubal gland were not clearly identified.In the severe case of patulous ET, the ET lumen was widely opened at each cross-sectional image from the pharyngeal orifice to the tympanic orifice, in contrast with its being closed at the cartilaginous portion in the normal cases.In addition, the fat tissue and glands around the ET lumen were not clearly identified in this case.We suggest that this method will lead to better understanding of the ET-related diseases such as patulous ET.

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