Analysis of normal tongue by dynamic enhanced MRI.

概要

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We qualitatively evaluated dynamic enhanced MR images of normal tongues of 26 patients without oral malignancy, inflammatory diseases or systemic dis eases. The selected slices were not affected by appar entartifacts including motion and susceptibility, and the tongue shape was delineated as symmetrical on coronal images, which were obtained using a T1 weighted spin echo pulse sequence (TR/TE=200/20). Slices at the incisor and molar levels were evaluated.<BR>Structures that could be identified on each pre contrastimage could also be identified on the post contrastdynamic enhanced image. However, identifi cationof the intrinsic tongue musculature was impossible on the images that were composed of symmetrical, relatively high signal areas surrounded by a low signal area. Both areas were gradually but apparently enhanced. The sublingual space was easily identified at the molar level, as it was rapidly enhanced and symmetrically delineated on each image, however, it was difficult to determine at the incisor level. Further, the lingual septum could also be identified in almost all images at the molar level, and showed no enhancement pattern, whereas, the mucosal surface of the dorsum tongue was rapidly enhanced, and identified on each image.
特定非営利活動法人日本口腔科学会の論文