Ohkubo Mai, Sano Tsukasa, Ishida Ryo, Higaki Takuo, Nishikawa Keiichi, Hayakawa Yoshihiko, Otonari Takamichi, Yamamoto-Otonari Mika, Harada Takuya, Wakoh Mamoru
Department of Dysphagia Rehabilitation and Community Dental Care, Tokyo Dental College, Chiba, Japan.
Bull Tokyo Dent Coll. 2008 Aug;49(3):113-9. doi: 10.2209/tdcpublication.49.113.
Evaluation of swallowing has been made possible by cine-Magnetic resonance (MR) imaging with high time resolution. However, the spatial resolution in cine-MR imaging remains inadequate for the detection of anatomical structures. Therefore, it is necessary to refer to static MR images in conjunction with cine-MR imaging. The aim of this study was to determine which MR parameters were appropriate for static imaging of the anatomical structures involved in swallowing. MR imaging was carried out, and T1-weighted, T2-weighted and proton-density-weighted MR images were obtained in the sagittal plane in 5 healthy volunteers. Each image was evaluated for anatomic landmark clarity by 3 oral radiologists. The anatomic landmarks selected were the lip, tip of tongue, center of tongue, tongue base, soft palate and epiglottis. Differences in clarity among 3 imaging modalities were evaluated. A 3-point score rating system was used. The results showed that lower TE sequences, i.e., either T1-weighted or proton-density-weighted images, were the most suitable for use in conjunction with cine-MR imaging in diagnosing swallowing disorders.
具有高时间分辨率的电影磁共振（MR）成像使吞咽评估成为可能。然而，电影MR成像中的空间分辨率仍不足以检测解剖结构。因此，有必要结合电影MR成像参考静态MR图像。本研究的目的是确定哪些MR参数适用于吞咽相关解剖结构的静态成像。对5名健康志愿者进行了MR成像，并在矢状面获得了T1加权、T2加权和质子密度加权MR图像。3名口腔放射科医生对每张图像的解剖标志清晰度进行了评估。选择的解剖标志是嘴唇、舌尖、舌中心、舌根、软腭和会厌。评估了3种成像方式之间清晰度的差异。使用了3分评分系统。结果表明，较低TE序列，即T1加权或质子密度加权图像，最适合与电影MR成像结合用于诊断吞咽障碍。
